Energy is the capacity of a physical system to perform work. Energy exists in several forms such as chemical, electrical, heat, sound, light and mechanical. http://physics.about.com/od/glossary/g/energy.htm Energy can be defined in a variety of different ways. However, the most common way to define energy is ‘the ability to work’. All living organisms need energy to survive, all the basic functions of a human to survive need energy, to maintain them from not stopping. e.g. breathing, the heart
Words: 321 - Pages: 2
signaling is one of the ways cells communicate with other cells. Endocrine signaling most naturally works with communicating with cells that are far away from each other. This long distance endocrine signaling works by releasing hormones into the circulatory system i.e., the bloodstream. For example, the pituitary gland in the brain is able to produce human growth hormone (HGH). The pituitary gland releases HGH into the bloodstream, where it will transport across the body to its receptor cells.
Words: 270 - Pages: 2
Anaphylaxis is Type 1 hypersensitivity response as it is ‘IgE mediated’. This involves an antigen/antibody response. To develop hypersensitivity a person must first be exposed to the antigen. On the initial exposure, the antigen activates the immune system and a hyper-production of IgE (immunoglobin) antibodies, which are produced by plasma B cells. The IgE antibody is specific to only that antigen and will bind to basophils and mast cells in the blood and blood vessel tissues, remaining inactive until
Words: 1245 - Pages: 5
Animal Diversity Time Requirements: Exercise 1: 15 mins. Exercise 2: 15 mins. Exercise 3: 30 mins. Exercise 4: 10 mins. Exercise 5: 15 mins. Exercise 6: 20 mins. Exercise 7: 30 mins. Exercise 8: 10 mins. Exercise 9: 30 mins. Materials Required: ITEM NUMBER (per group) LOCATION Any living or preserved plant *specimens (listed below) Display Cart/Counter Microscopes (compound and dissecting) Display Counter Colored pencils 1 set Cart/Counter *Specimens: Preserved
Words: 4763 - Pages: 20
The major function of the respiratory system is to supply the cells in the human body with oxygen and get rid of wastes like carbon dioxide. The respiratory system consists of many components that are all linked together. At the start is the nasal cavity then going down is the epiglottis, which is a flap of skin that closes the end of the trachea as you swallow food, then the pharynx. Going down the same path is the larynx (voice box) then it meets the trachea (windpipe), splitting to the left
Words: 474 - Pages: 2
of all the elements of blood through the circulatory system. No organ in the body produces blood plasma but it is a product of several organs. As already stated, it consists of water, salts (electrolytes) and proteins (albumin and antibodies). All the water, salts and proteins are ultimately derived from the food we eat. Water and salts are regulated by the renal system. Albumin is produced by the liver and antibodies are a product of the immune system. There is also a balance of proteins and water
Words: 325 - Pages: 2
connected to the posterior end of the mouth. We are now travelling downward through a long muscular tube that extends from the pharynx to the stomach and the food will then enter the esophagus. The pharynx serves two different functions in the digestive system; it has a flap of tissue called the epiglottis that acts as a switch to route food to the esophagus and air to the larynx (enchantedlearning.com, 2001). The food has now entered the esophagus and we are experiencing a series of rhythmic, wave like
Words: 1330 - Pages: 6
techniques involves injecting into one compartment of the body a substance that absorbs X-Rays either less than or more than the surrounding tissue. (Pinel, JJ 2011). A contrast X-ray technique is called cerebral angiography; it is to visualize the circulatory system. This X-Ray is useful for localizing vascular damage, but the displacement of blood vessels from their normal position also can indicate the location of a tumor. The standard X-ray that is used is the X-ray computed tomography (CT). The CT is
Words: 423 - Pages: 2
Introduction A system is made up of different tissues and organs working together to perform a specific function in the body. Skeletal system: Skeletal system is the system of bones, associated cartilages and joints of human body. Together these structures form the human skeleton. Skeleton can be defined as the hard framework of human body around which the entire body is built. Almost all the hard parts of human body are components of human skeletal system. Joints are very important because
Words: 2748 - Pages: 11
Anatomy & Physiology of the Respiratory System respiratory system The respiratory system is situated in the thorax, and is responsible for gaseous exchange between the circulatory system and the outside world. Air is taken in via the upper airways (the nasal cavity, pharynx and larynx) through the lower airways (trachea, primary bronchi and bronchial tree) and into the small bronchioles and alveoli within the lung tissue. Move the pointer over the coloured regions of the diagram; the names
Words: 379 - Pages: 2
