...human body. Attached to the bones of the skeletal system are about 700 named muscles that make up roughly half of a person’s body weight. Each of these muscles is a discrete organ constructed of skeletal muscle tissue, blood vessels, tendons, and nerves. Muscle tissue is also found inside of the heart, digestive organs, and blood vessels. In these organs, muscles serve to move substances throughout the body.... Muscular System Anatomy Muscle Types There are three types of muscle tissue: Visceral, cardiac, and skeletal. 1. Visceral Muscle. Visceral muscle is found inside of organs like the stomach, intestines, and blood vessels. The weakest of all muscle tissues, visceral muscle makes organs contract to move substances through the organ. Because visceral muscle is controlled by the unconscious part of the brain, it is known as involuntary muscle—it cannot be directly controlled by the conscious mind. The term “smooth muscle” is often used to describe visceral muscle because it has a very smooth, uniform appearance when viewed under a microscope. This smooth appearance starkly contrasts with the banded appearance of cardiac and skeletal muscles. 2. Cardiac Muscle. Found only in the heart, cardiac muscle is responsible for pumping blood throughout the body. Cardiac muscle tissue cannot be controlled consciously, so it is an involuntary muscle. While hormones and signals from the brain adjust the rate of contraction, cardiac muscle stimulates itself to contract. The natural...
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...The occipital bone is a flat bone The lumbar vertebra is a 3. Most connective tissue, including bone, is highly vascular. Which anatomical structures in Mrs. Morgan’s compact bone house blood vessels? What sign or symptom in Mrs. Morgan’s case is directly related to disruption of these structures by her bone fractures? How is the sign or symptom related...
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...Cell Theory Cell Theory is a way to describe the biology of living things. Cell theory says that the cell is the basic unit of life. Cells by themselves are alive, but they can also be part of a larger living thing. The smallest living organisms (like bacteria but not viruses) and the biggest ones (like humans and whales) are all made of cells. Very small organisms like bacteria and amoebas are only made of one cell each, so they are called unicellular organisms ("uni" means "one"). Larger organisms are made of many cells, and they are called multicellular organisms. Definition: The Cell Theory is one of the basic principles of Biology. Credit for the formulation of this theory is given to German scientists Theodor Schwann, Matthias Schleiden, and Rudolph Virchow. The Cell Theory states: * All living organisms are composed of cells. They may be unicellular or multicellular. * The cell is the basic unit of life. * Cells arise from pre-existing cells. The modern version of the Cell Theory includes the ideas that: * Energy flow occurs within cells. * Heredity information (DNA) is passed on from cell to cell. * All cells have the same basic chemical composition. Animal Tissues 1. Epithelial: In Greek, ἐπί (epi) means "on" or "upon", and θηλή (thēlē) means "nipple". Epithelial layers are avascular, so they must receive nourishment via diffusion of substances from the underlying connective tissue, through the basement membrane. Epithelia...
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...Human Body Systems By: Thomas McDonough 5/1/15 Biology Period 5A Table of Contents Chapter 1 The Skeletal System Chapter 2 The Muscular System Chapter 3 The Integumentary System Chapter 4 The Circulatory System Chapter 5 The Respiratory System Chapter 6 The Digestive and Excretory Systems Chapter 7 The Nervous System Chapter 8 The Immune and Endocrine Systems Introduction The human body. A collection of organ systems that make up you, a living thing. But how does that work? How does your body function? The goal of this book is to help you understand all of that. As previously stated, the human body is a collection of organ systems. But what is an organ system? An organ system is a...
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...completed first, but you’ll probably get a lot of hints about the answers for part 2 if you’ve looked over the images and questions provided ahead of time to work on them. To do Part 1, download the following documents and have your textbook available. Part 1 Characteristics of tissues A. Epithelial Tissues What are five general characteristics which distinguish epithelial tissues? (1. Cellularity: tightly packed sheets of cells with little intercellular material between them 2. Basement membrane; the basal surface of ETs are anchored to underlying CT by a distinct basement membrane 3. Specialized contacts: tight junctions and desmosomes 4. Avascularity: contain no blood vessels; are nourished by nutrients which diffuse upward from underlying connective tissue through the basement membrane 5. Regeneration: high regeneration capacity due to rapid cell division ) Explain how the general morphology of epithelial cells may be deduced from the names of the epithelial tissues. (The names of the epithelial cells are characteristic of their structure: simple=single layer stratified=many layers squamous=flat cuboidal=cube shaped columnar=elongated ) Epithelial tissues specialized for secretion can be found in two types of glands. What are the gland types, and what are the functional characteristics of each? (Exocrine glands secrete products into a duct, which opens onto and external surface (ie sweat gland) or an internal space/lumen (ie gastric gland). Endocrine glands...
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... Health and Social Care The structure of the main tissues of the body- P2 A humans body is made up entirely of cells, without cells there would be no body. Tissues are basically groups of cells, that have almost the shape and function, and there are four main tissues of the body, which are: Epithelial tissue, Connective tissue, Nervous tissue and Muscle tissue. Epithelial tissue- Epithelial tissue is one of the most important tissues of the body as it covers all of the surface of the human body. This tissue is made up of cells which are all packed in one or multiple layers. The main job of this tissue is to form the covering or lining of all of the internal and external bodies surfaces. Epithelial cells are packed tightly together, with almost spaces between them, and only a small amount of inter cellular substance. Inter celluar substance is the bodies substance in which tissue cells are embedded. No matter what the type is, Epithelial tissue is usually separated from the underlying tissue by a thin sheet of connective tissue, this is called basement membrane. The basement membrane's job is to provide structural support for the epithelium and also to bind it to neighboring structures. Connective tissue- The main role of connective tissue is to fill in the spaces between organs and tissues, and also to provide structural and metabolic support for other tissues and organs. Connective tissue is made up of cells and extra cellular matrix. The extra cellular...
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...Dr. Robert P. Marino Review Questions 2 Question 1 Describe basic bone structure and classification. There are two basic types of Bone tissue, compact bone and spongy bone. 1. Compact bone is dense and homogeneous and forms the walls of bone. 2. Spongy bone is composed of slender intertwined pieces of bone enclosing a space filed with non-bone tissue. It is found in the interior of normal bone. Bones can also be classified according to shape: 1. Long bones are longer than they are wide. All bones of the limbs except for the wrist and ankle bones are long bones. 2. Short bones are cube-shaped and are found in the wrist and ankle of the limbs. 3. Flat bones are thin and flat and often curved. These bones include some bones of the skull, the ribs and the sternum. 4. Irregular bones as their name suggests do not fit conveniently into any category according to their shape. 5. Sesamoid bones is not a category based on shape although they tend to be short bone. A sesamoid bone is a bone that develops within a tendon. The knee cap or patella is an example. Question 2 Bones grow in length at the growth plate by a process that is similar to ossification. The cartilage in the region of the growth plate next to the epiphysis continues to grow by mitosis. This process continues throughout childhood and the adolescent years until the cartilage growth slows and finally stops. When cartilage growth ceases, usually in the early twenties, the growth plate completely ossifies...
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...There are four types of tissue found in animals: connective, muscle, nervous, and epithelial. We are going to go into muscle tissue. The cells of muscle tissues are called fibers. There are three types of muscle tissue and they are skeletal, cardiac, and smooth. All types can go though hypertrophy (enlargement or overgrowth of an organ or part of the body due to the increased size of the constituent cells). Muscle fibers contract due to the interaction of the contractile proteins, actin and myosin. Muscle contraction generates contractile force (tension). The contractile proteins of muscle are located in protein filaments called myofibrils. Muscle tissues function in body movements like locomotion and also in the movement of the body’s internal materials. Muscle tissues are mostly controlled by the nervous system, but cardiac and smooth muscle may be additionally regulated by the endocrine system. Now we are going to go into the types of muscle tissue. The structure of skeletal muscle tissue is formed from striated skeletal muscle fibers (cells). The fibers are characterized by being long, striated, parallel, cylindrical, and multinucleate. The fibers are separated by a connective tissue called endomysium. 80% of the fiber consists of rod-like protein filaments called myofibrils, which extend the length of the fiber and contain the contractile elements. The thick and thin protein filaments are organized to produce the alternating dark and light cross bands perpendicular to the...
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...of the human body. Include the cell, skeletal and the muscular system and any other distinct features you may deem appropriate. Your answer may include various types of tissue found in the human body. Intro The body has many different features that work together to ensure it functions as it should, and ensure it stays healthy. This includes regulating heat, transporting nutrients and fighting of foreign bacteria that may cause harm. These features also include assisting with the body’s voluntary movement and the sending of signals throughout the body that allow these functions to occur. The Cell The main function of the cell includes both transporting different materials used throughout the body. Cells are used in...
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...anatomy/physiology of muscle contraction. Anatomy of Skeletal Muscle: A single skeletal muscle, such as the triceps muscle, is attached at its • Origin to a large area of bone; in this case, the humerus. • At its other end, the insertion, it tapers into a glistening white tendon which, in this case, it’s attached to the ulna, one of the bones of the lower arm. As the triceps contracts, the insertion are pulled toward the origin and the arm is straightened or extended at the elbow. Thus the triceps is an extensor. Because skeletal muscle exerts force only when it contracts, a second muscle a flexor is needed to flex or bend the joint. The biceps muscle is the flexor of the lower arm. Together, the biceps and triceps make up an antagonistic pair of muscles. Similar pairs, working antagonistically across other joints, provide for almost all the movement of the skeleton. The Muscle Fiber Skeletal muscle is made up of thousands of cylindrical muscle fibers often running all the way from origin to insertion. The fibers are bound together by connective tissue through which run blood vessels and nerves. Each muscle fibers contains: • An array of myofibrils that are stacked lengthwise and run the entire length of the fiber; • Mitochondria; • An extensive smooth endoplasmic reticulum (SER) • Many nuclei (thus each skeletal muscle fiber is a syncytium). The multiple nuclei arise from the fact that each muscle fiber develops from the...
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...THE WEEK OF OCT. 12! For Next Recitation (10/16 and 10/19) Read Lab 8 Quiz covering Lab 8 1 THE HUMAN BODY – LEVELS OF ORGANIZATION 1. MOLECULES (e.g. water, two atoms of hydrogen linked to one atom of oxygen) and macromolecules ( = "large molecules", e.g. DNA) 2. CELLS (e.g. white blood cells, muscle cells, nerve cells), which contain cell organelles (e.g. mitochondria, little powerhouses that produce energy for the cells) 3. TISSUES, made up of cells (e.g. muscle tissue, nerve tissue) 4. ORGANS, groups of tissues (e.g. liver, heart, kidney) 5. SYSTEMS, groups of organs designed to do a specific job (e.g. the digestive system, reproductive system, nervous system). Cavities of the Body Membranes of the Body MEMBRANES THORACIC CAVITY PLEURAL lines thoracic cavity and covers lungs ABDOMINOPELVIC CAVITY PERICARDIAL surrounds heart and covers its surface PERITONEAL lines abdominopelvic cavity and covers organs inside (stomach, intestines, etc.) 2 ORGAN SYSTEMS 1. Body covering 2. Support, protection and movement 3. Integration and coordination 4. Processing and transporting 5. Reproduction - integumentary system - skeletal system - muscular system - nervous system - endocrine system - digestive system - respiratory system - circulatory system - lymphatic system - urinary system - reproductive system Some New Words You must learn the following descriptions of the relative positions of body parts...
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...actions amid cells, carry nutrients to cells, and carry waste products away from cells. They are the primary transport system between cells. The internal environment of the body is extracellular fluid, which refers to all of the fluids outside of our cells in our bodies – such as blood plasma, interstitial fluid, lymph and transcellular fluid. These fluids make up approximately 1/4 of body weight. Describe the three major types of lipids found in the body. (6 marks) * The three major types of lipids found in the body are triglycerides, phospholipids, and sterols (cholesterol). Triglycerides are fatty acids. Its functions include energy storage and the cushioning and insulating of the body and nerves. All nerves are wrapped in a myelin sheath; or lipid layer. Phospholipids are similar to triglycerides, but contain a phosphate group. It is a lipid bilayer – membranes in eukaryotic cells and the plasma membrane of cells. Sterols are made from lipids, but have no fatty acids in their structure. Cholesterol makes up sex hormones and carries lip-proteins. Describe briefly what is occurring at each step in the figure. (3 marks) * Name and briefly describe the cell shapes, arrangements, and functions of cell layers found in epithelial tissues. (3 marks) * In epithelial tissue, there are squamous cells, which are flat with the nucleus located near the upper surface. Cuboidal cells are cube-shaped (or hexagonal) with a central, round nucleus. Cuboidal cells absorb...
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...organizational level intervening between cells and a complete organ. A tissue is an ensemble of similar cells from the same origin that together carry out a specific function. Organs are then formed by the functional grouping together of multiple tissues. Epithelial Tissue Epithelial tissue covers the whole surface of the body. It is made up of cells closely packed and ranged in one or more layers. This tissue is specialized to form the covering or lining of all internal and external body surfaces. Epithelial cells are used for protection, absorption and secretion. Cell shapes found in epithelial tissue are squamous, cuboidal, columnar and transitional. Epithelial tissue is highly specialised for selective secretion and absorption of ions and molecules. Squamous: Squamous cells make up most of the cells in the outer layer of the skin. They have the appearance of thin, flat plates. Squamous cells form the lining of cavities such as the mouth, blood vessels, heart and lungs and make up the outer layer of the skin. Cuboidal: By lining the surface of various ducts of various glands and organs, simple cuboidal cells are able to provide a layer of protection from abrasion, foreign particles, invading bacteria and excessive water loss to the underlying tissue. In the kidney tubulus, the cells aid in the absorption and transport of filtered substances. Simple cuboidal consists of a single layer of cells with the same height and width. The cells are equally wide as they are tall creating...
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...in and out of the cell. The cell membrane contains phospholipids, proteins and carbohydrates. These are arranged in a fluid mosaic structure. Cytoplasm: The cytoplasm is everything that is outside the nucleus and inside of the cell membrane. The fibre network helps maintain its shape and gives it support. Nucleus: Nucleus contains the DNA and is like a brain Ribosome: Ribosomes contain and give out the protein. They connect to each other to build a long chain. Endoplasmic reticulum: Endoplasmic reticulum is the network that is inside the cytoplasm of cells involved in transporting things to and from the cell. Mitochondria: Mitochondria convert energy into different forms that the cells can use. Mitochondria’s are found in the cytoplasm. Centrosome: Centrosomes are found near the nucleus in most cells. They consist of centriole which is surrounded by a centrosphere. The two parts move to opposite poles. This then divides the cell. The information I got my definitions from are http://www.cellsalive.com/ & http://www.williamsclass.com/SeventhScienceWork/CellTheoryParts.htm and http://www.biologyjunction.com/cell_functions.htm Epithelial tissue is one of four types of tissues in a body. Epithelial makes up many parts of the body. For example the skin, it also lines the inside of the body and cavities. Epithelial tissue can be divided up into two basic types. The first type is the simple tissue which is made up of one layer of cells. The other type...
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...Cells, Tissues and Body Systems P2 Nervous Tissue A number of components make up the nervous system and these are also composed of the nervous tissue. The nervous tissue performs an imperative part in the fact that it is in charge for accepting, distributing and handling sensory input. It can be found in the three main areas of the nervous system which are the brain, nerves and the spinal cord. The nervous system contains two significant parts which are defined as peripheral and central. The peripheral nervous system (PNS) includes the nerves that spread to all ends of the body and the central nervous system (CNS) consists of the spinal cord and the brain where it acts as the fundamental processing interior for all stimuli. Neurons are the specialised basic elements that work inside the nervous tissue. The functional and structural organisation of neurons can be described by elements such as an axon. This transmits information to different neurons, muscles and glands and is usually made from a nerve fibre which is a single process expanding from the cell body of a neuron and carrying nerve impulses away from it. Dendrites carry nerve impulses from adjacent neurons into the cell body and are one of the shorter branching processes of the cell body of a neuron. A motor neuron transmits electrical signals for communication within the body from the central nervous system to the brain and the spinal cord, to muscles and glands elsewhere in the body. The synapse causes...
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