...The four basic human body structure units are cells, tissues, organs and systems which, all working together make the human body function. The cells are the core structure that make up the human body, although there are many different shapes, sizes and types they consist of three main parts, the cell membrane which maintains the shape of the cell and separates and controls the movement of material into and out of the cell, the nucleus which contains the cells DNA and determines its structure and function and the cytoplasm which is the fluid in the cell that contains the organelles which perform its specific functions. There are many cell functions dependant on the cell type but the generalised functions are molecule transport, reproduction and protein synthesis. Molecule transport is the transfer of material through the cell membrane, there are two ways this happens, diffusion and active transport. Diffusion is when molecules such as oxygen, carbon dioxide and water move from areas where there are many of the particles (high concentration) to areas with less (low concentration). Active transport is when substances are at lower concentration and require energy to be transferred. There are two means of active transport, endocytosis which is the movement of molecules from outside to inside the cell and exocytosis which is movement of molecules from inside to outside the cell, both performed via the formation of vesicles which package the molecules then fuse...
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... 1. Describe the four basic human body structure units and their functions The four basic human body structure units and their functions are: Cells, Tissues, Organs, and Systems. Cells Humans and all living things are made up of about 100 trillion small cells that can only be seen via a microscope. Cells can reproduce themselves and live independently. Some cells are specialized and become a different shape and size (elongated, oval, square, flat etc) dependant on its function. Here are just a few examples: * Epithelial cells – can be flat, cubed or column shaped. They protect the bodies tubes and cavities. They also cover the body forming the epidermis (the upper layer of skin) * Sperm cells and egg cells – for reproduction (sperm cells are tadpole shaped and egg cells are circular shaped. * Red Blood cells – these are doughnut shaped cells without a nucleus. They carry haemoglobin which gives the cell its red colour and carries oxygen around the body via the blood stream. * White Blood cells – are irregular in shape and size. They also have a nucleus. When foreign invaders like bacteria or viruses enter the body they detect it and then destroy it. * Platelets – are small bits of cells that clot the blood when there is a cut such as with a knife or abrasions received in a fall. Tissues Tissues are a group of similar cells working together to perform a function. The four main tissue types in the body are Epithelial, Connective...
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...Basic Human Body Structure Units And Their Functions In: Science Basic Human Body Structure Units And Their Functions 1.1 Describe the four basic human body structure units and their functions The four basic human body structures and their functions are as follows: • Cells • Tissues • Organs • Systems Cells Cells have been identified as the simplest unit of living matter that can maintain life. A cell is the simplest and smallest unit of living matter and cells can live independently and can also reproduce themselves. Cells exist in a varity of shapes and sizes including elongated, oval, and square, cells also have many different function. A group of cells is called a tissue and the study of the structure, form of cells and tissue is called histology. Tissues Tissue is a group/organisation of a number of similar cells, not all identical but from the same origin, that carry out a similar function, which also consists of varying amounts and varity of non-living, intercellular substance between them. It is the level between cells and organs. There are four types of tissue: Epithelial – tissue that is widespread throughout the body. They form the covering of all the body surfaces and are the main tissue found in glands. Epithelial tissue performs a variety of functions that include protection, secretion, absorption, filtration and sensory reception. Connective - tissue that binds structures together, and forms a framework and support...
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...TMA 1 1.1 Describe the four basic human body structure units and their functions. The four basic human structure units are : * Cells * Tissues * Organs * Systems Cells : These are the basic structural unit of the body that maintain life. Every person consists of billions of cells that perform a infinite number of tasks in order to maintain the continuation of life. These live independently and can reproduce themselves. A cell also comes in different shapes and sizes depending on their function within the stability of life, for example, a mature red blood cell is less than 1mm in diameter and their function is to transport oxygen around the body. Tissues : Tissue is a collection of cells, not identical but a similar function, specialised to perform a specific function. Tissue comes in many different forms including blood, muscle, glands and bone(such as cartilage). These can also form nerve tissue to which are cells that specially conduct electrochemical nerve impulses throughout the body. Organs : All organs are formed when tissue combines with other forms of cells. This then gives you a structural unit, for example, a heart, that perform a specific function. Other examples of organs include the eye, liver, stomach, testis, uterus and kidneys all with their own particular function in sustaining life. Systems : System are cells, tissues and organs all working together to get a final outcome. For example, your digestive system needs a mouth,...
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...Tma1 TMA 1 1.1 Describe the four basic human body structure units and their functions. The four basic human structure units are : * Cells * Tissues * Organs * Systems Cells : These are the basic structural unit of the body that maintain life. Every person consists of billions of cells that perform a infinite number of tasks in order to maintain the continuation of life. These live independently and can reproduce themselves. A cell also comes in different shapes and sizes depending on their function within the stability of life, for example, a mature red blood cell is less than 1mm in diameter and their function is to transport oxygen around the body. Tissues : Tissue is a collection of cells, not identical but a similar function, specialised to perform a specific function. Tissue comes in many different forms including blood, muscle, glands and bone(such as cartilage). These can also form nerve tissue to which are cells that specially conduct electrochemical nerve impulses throughout the body. Organs : All organs are formed when tissue combines with other forms of cells. This then gives you a structural unit, for example, a heart, that perform a specific function. Other examples of organs include the eye, liver, stomach, testis, uterus and kidneys all with their own particular function in sustaining life. Systems : System are cells, tissues and organs all working together to get a final outcome. For example, your digestive system needs a mouth...
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...Clinical Notes The Visible Human Project p. 7 Homeostasis and Disease p. 13 An Introduction to Studying the Human Body This textbook will serve as an introduction to the inner workings of your body, providing information about both its structure and its function. Many of the students who use this book are preparing for careers in health-related fields—but regardless of your career choice, you will find the information within these pages relevant to your future. You do, after all, live in a human body! Being human, you most likely have a seemingly insatiable curiosity—and few subjects arouse so much curiosity as our own bodies. The study of anatomy and physiology will provide answers to many questions regarding the functioning of your body in both health and disease. Although we will be focusing on the human body, the principles we will learn apply to other living things as well. Our world contains an enormous diversity of living organisms that vary widely in appearance and lifestyle. One aim of biology—the science of life—is to discover the unity and the patterns that underlie this diversity, and thereby shed light on what we have in common with other living things. Animals can be classified according to their shared characteristics, and birds, fish, and humans are members of a group called the vertebrates, characterized by a segmented vertebral column. The shared characteristics and organizational patterns provide useful clues about how these animals have evolved over time...
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...1.1 Describe the four basic human body structure units and their functions The way in which physical processes and functions take place in the body can be looked at on four main levels, moving progressively from the detailed to the general. At the most detailed level are the cells – the most basic of the physical structure units. Similar cells, when combined and held together, form tissue, the next main structure unit. Organs are collections of tissues that are combined to perform a particular function in the body. Organs do not work in isolation, however, and combine with other organs to create a biological system. Cells The cell is the most basic structural unit in the body. There are around 300 different cell types in the human body. While they differ in function, there are certain fundamental components or features that they generally have in common, such as a nucleus (with the exception of red blood cells), cytoplasm and a cell or plasma membrane. A cell membrane is composed of 60% protein, and 40% lipid, or fat. This membrane is a phospholipid bilayer which contains embedded protein molecules. It is a living boundary separating the living contents of the cell from its environment. Its function is to regulate the passage of molecules into and out of the cell. Within the membrane, the cell consists of cytoplasm, a gel-like substance containing organelles - small structures each with their own function. Common to all human cells except red blood cells, the nucleus is...
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...The Four Basic Human Body Structure Units and Their Functions The four basic human body structure units are cells, tissues, organs and systems which, all working together make the human body function. The cells are the core structure that make up the human body, although there are many different shapes, sizes and types they consist of three main parts, the cell membrane which maintains the shape of the cell and separates and controls the movement of material into and out of the cell, the nucleus which contains the cells DNA and determines its structure and function and the cytoplasm which is the fluid in the cell that contains the organelles which perform its specific functions. There are many cell functions dependant on the cell type but the generalized functions are molecule transport, reproduction and protein synthesis. Molecule transport is the transfer of material through the cell membrane, there are two ways this happens, diffusion and active transport. Diffusion is when molecules such as oxygen, carbon dioxide and water move from areas where there are many of the particles to areas with less. Active transport is when substances are at lower concentration and require energy to be transferred. There are two means of active transport, endocytosis which is the movement of molecules from outside to inside the cell and exocytosis which is movement of molecules from inside to outside the cell, both performed through the formation of vesicles which package the molecules...
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...Huddersfield, West Yorks HD3 4LN HUMAN ANATOMY AND PHYSIOLOGY LEVEL 2 Assignment 1 TMA 1 1.1 Describe the four basic human body structure units and their functions? The four basic human structures are cells, tissues, organs, and systems. The cell is the smallest building block of the body, and is the basic structural and functional unit of all known living organisms. They live independently and can reproduce itself. A group of cells form Tissues. They come in all different sizes such as elongated, square, oval and even star shaped. The cell is made up of protoplasm (jelly like substance), it is 70% water plus organic and inorganic salts, carbohydrates, lipids (fatty substance), nitrogenous substances, (these are amino acids obtained from protein), and compounds of all the above. Blood for example is a liquid tissue made up of several different types of cells. Cells allow us to breathe, digest, excrete, reproduce, sense, grow, move, die. When a cell goes wrong this can be the origin of disease and illness. Tissues, is a group or cells joined together, there is four different types of tissue, epithelial, connective, nervous and muscular. Epithelial There is two categories of epithelial tissue, simple and compound, simple is often found as a covering or lining for organs and vessels. Compound provides external protection and the internal elasticity. All in all the tissue performs a variety of functions including protection, secretion, absorption, filtration...
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...An important organ that is part of lymphatic system. It is an internal body organ in the abdomen just underneath the left rib cage. Spleen lies between fundus of stomach and diaphragm. In addition, “it is the largest collection of reticuloendothelial cells in the body and is composed of sponge like tissue of two types: red pulp, which is the dark reddish brown substance filling the interspaces of the sinuses of the spleen, and white pulp, which consists of sheaths of lymphatic tissue surrounding the arteries of the spleen” (Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, 2003). The spleen is not part of the digestive system however is connected to the blood vessels of both the stomach and the pancreas. Spleen...
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...well as those prepared by CBSE, NCERT and COBSE. This is to establish a uniformity across the country keeping in view the relevance of different areas in Medical Education. PHYSICS S.No. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. CLASS XI Physical world and measurement Kinematics Laws of Motion Work, Energy and Power Motion of System of Particles and Rigid Body Gravitation Properties of Bulk Matter Thermodynamics Behaviour of Perfect Gas and Kinetic Theory Oscillations and Waves CLASS XII Electrostatics Current Electricity Magnetic Effects of Current and Magnetism Electromagnetic Induction and Alternating Currents Electromagnetic Waves Optics Dual Nature of Matter and Radiation Atoms and Nuclei Electronic Devices CHEMISTRY S.No. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. CLASS XI Some Basic Concepts of Chemistry Structure of Atom Classification of Elements and Periodicity in Properties Chemical Bonding and Molecular Structure States of Matter: Gases and Liquids Thermodynamics Equilibrium Redox Reactions Hydrogen s-Block Element (Alkali and Alkaline earth metals) Some p-Block Elements Organic Chemistry- Some Basic Principles and Techniques Hydrocarbons Environmental Chemistry CLASS XII Solid State Solutions Electrochemistry Chemical Kinetics Surface Chemistry General Principles and Processes of Isolation of Elements p- Block Elements d and f Block Elements Coordination Compounds Haloalkanes and Haloarenes Alcohols, Phenols and Ethers Aldehydes, Ketones and...
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...1. Describe the four basic human body structure units and their functions The four basic human body structures and their units are as follows – • Cells • Tissues • Organs • Systems Cells A cell is the simplest and smallest unit of the human body. They can live independently and can also reproduce themselves. Cells exist in a variety of shapes and sizes including elongated, oval and square. Cells have many different functions. A group of cells is called a tissue. The study of the structure, and the form of cells and tissues is called histology. Joanne Thomas NC26585 Assignment 1 Page 2 Tissues Tissue is a group/organization of a number of similar cells, not all are identical, but all are from the same origin. They carry out a similar function, of which consists of a varying amount of non-living and intercellular substances. There are four main types of tissues – Epithelial tissue This is widespread throughout the body. They form the covering to all the body surfaces and is the main tissue found in glands. This tissue performs a variety of functions including protection, secretion, absorption, filtration and sensory receptors. Connective tissue This binds structures together and provides a framework and support for organs and the body as a whole. It also acts as a transport system to carry substances around the body, and it also helps to store flat. It helps to...
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...from top left: Salmonella typhimurium, Phascolarctos cinereus, Athyrium filix-femina, Amanita muscaria, Agalychnis callidryas, and Brachypelma smithi Biology is a natural science concerned with the study of life and living organisms, including their structure, function, growth, origin, evolution, distribution, and taxonomy.[1] Biology is a vast subject containing many subdivisions, topics, and disciplines. Among the most important topics are five unifying principles that can be said to be the fundamental axioms of modern biology:[2] 1. Cells are the basic unit of life 2. New species and inherited traits are the product of evolution 3. Genes are the basic unit of heredity 4. An organism regulates its internal environment to maintain a stable and constant condition 5. Living organisms consume and transform energy. Subdisciplines of biology are recognized on the basis of the scale at which organisms are studied and the methods used to study them: biochemistry examines the rudimentary chemistry of life; molecular biology studies the complex interactions of systems of biological molecules; cellular biology examines the basic building block of all life, the cell; physiology examines the physical and chemical functions of the tissues, organs, and organ systems of an organism; and ecology examines how various organisms interact and associate with their environment.[3] Contents [hide] * 1 History * 2 Foundations of modern biology * 2.1 Cell theory ...
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...purpose This unit aims to enable learners to understand aspects of the anatomy and physiology of human body systems. Learners will be able to gain an overview of the organisation of the human body before looking at how body systems work together to provide energy for the body. Learners will have the opportunity to investigate how homeostatic mechanisms operate in the body. Unit introduction This unit introduces core knowledge of cellular structure and function, and the organisation of the body as a whole, and then builds on this to develop a more detailed knowledge of the fine anatomy and physiology of the systems involved in energy metabolism. Learners will examine the homeostatic mechanisms involved in regulating these systems to maintain health. Learners will be given the opportunity to undertake practical activities which will require them to take measurements of the cardio-vascular system, the respiratory system and of body temperature, using noninvasive techniques to investigate normal responses to routine variations in body functioning. This unit provides the core understanding of human physiology that underpins the study of the specialist physiology units within this programme. The unit also provides an overview of body functioning that is valuable for anyone working or intending to work in a field relating to health and social care. Learning outcomes On completion of this unit a learner should: 1. Know the organisation of the human body 1. Understand...
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...does the subject of nutrition include? The subject of nutrition includes the processes by which the human organism ingests, digests, absorbs, transports, and excretes food substances. What is the benefit of food to the body? Food provides the energy in the form of calories as well as the materials needed to build and maintain all body cells. What is the benefit of nutrition to the body? Nutrients are the substances obtained from food that are vital for growth and maintenance of a healthy body throughout life. What is one classification of nutrients? Nutrients can be classified as essential or nonessential What is an essential nutrient? An essential nutrient is a nutrient that the body either cannot synthesize on its own or cannot make an adequate amount of, and must be provided by the diet because it is necessary for the body to function properly. What criteria must be met for a nutrient to be considered "essential?" For a nutrient to be considered essential, it must meet the following criteria: 1) At least one specific biological function of the nutrient in the body must be identified. (2) Omission of the nutrient from the diet must lead to a decline in certain biological functions, such as production of blood cells. (3) replacing the omitted nutrient in the diet before permanent damage occurs will restore those normal biological functions. Why should you study nutrieiton? You should study nutrition because is a lifestyle factor that...
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