P2, Unit 5- Tissue Types

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Brooke Lowe Health and Social Care Unit 5- Anatomy and Physiology P2 Tissue Types Epithelial Epithelial tissues cover the whole outer surface of the body (aka skin) and line the inner surfaces such as the lungs, stomach, intestines and blood vessels. As epithelial tissue is exposed on the outside of the body it is prone to get damaged. The skin gets cut, grazed, rubbed and bruised, therefore the tissue needs to repair itself and this repairing process usually occurs during sleep. Due to all of the accidents epithelial tissue is prone to it has a greater growth and repair rate than any other tissues. There are many structures of epithelial tissue, however I will only briefly cover four of them, these are squamous ,cuboidal, columnar and compound cells. http://kidsresearchexpress-5.blogspot.co.uk/2008/08/tissue.html Squamous Epithelial Cells Squamous cells are flat and they fit closely together, they don’t offer much protection as they are quite delicate and thin. Due to their thin construction, this allows small molecules to easily diffuse through the cell. This type of epithelial tissue can be found in places where rapid diffusion takes place such as the kidneys as they diffuse up to 180 litres of blood every day. http://www.bio.davidson.edu/people/kabernd/berndcv/lab/epithelialinfoweb/simple%20squamous%20epithelium.html Cubodial Epithelial Cells Cubodial cells are obviously shaped like a cube, hence the name. Even though they may look hexagon in shape at the surface, if we cut into them we can see they are cubed in shape and contain a spherical nucleus. These types of tissue cells are classes as simple as they only consist of a single layer of cells. Those cells with numerous layers would be considered complex tissue cells. The function of the cuboidal cell is to provide a layer of protection against abrasions, foreign objects, invading bacteria

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