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Emonie Hall

on 14 September 2012

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Transcript of Tissues

Tissues A tissue is a group of specialized similar cells to preform a specific function muscle tissue-
connective tissue
epithelial tissue
nervous tissue muscle tissue is specialized to contract or short; to produce movement the cardiac muscle found only in the heart contains gap junctions that allow ions to pass freely from cell to cell a.k.a the electrical impulses across the heart Connective Tissue connects the body parts; it is found everywhere in the body. Most connective tissue is well vascularized but tendons and ligaments are not. a type of connective tissue is adipose tissue a.k.a fat; one glistening droplet of oil occupies most of the fat cells volume because of this the nucleus is displaced to one side BUT an upside is that fat tissue protects the kidney and act as an insulator connective tissue comes in four forms which are liquid, semi-solid, gel like or hard; connective tissue also heals slowly but it helps with stretching epithelial tissue is the lining, covering, and glandular tissue inside the body. glandular epithelium form various glands in the body lining and covering epithelium covers all free body surfaces and versatile cells Without tissue, our bodies would not be able to protect important parts of our body like the lungs, skin, neurons, and other body tissues. Tissue heals wounds, absorbs food, connects body parts, and produces movement. Without tissue we would be nothing, literally!!! epithelial functions include protection, absorption, filtration, and secretion...they are also classified as simple(one layer of cells) and stratified(more than one layer) Epithelial tissue is either simple or stratified. Simple Epithelial is a single layer of thin squamous cells resting on a basement membrane. This type of epithelium usually forms membranes where filtration or exchange of substances by rapid diffusion occurs. The stratified columnar and cuboidal have two cell layers found at the base of the membrane. These are only found in the ducts of your glands to cleanse them. glandular epithelium needs materials from the blood to make their secretion. Nervous tissues have neutrons that receive and conduct electricity to allow electrochemical impulses from one part of the body to another. This also is the tissue that allows our bodies to heal when cut. The cytoplasm allows a single neutron to conduct an impulse over long distances. This is how we feel everything anywhere. When tissue injury occurs, it stimulates the body's inflammatory and immune responses and this healing process can be done through regeneration (where same cells will repair) or fibrosis (defensive cells will repair-scar tissue). The healing process:
capillaries will develop clotting proteins in the bloodstream, where these hit the air the blood will dry to form a scab
granulation tissue formed by the capillaries will then fill in the damaged area
phagocytes will dispose of the blood clot cells and help develop the collagen fibers (scar tissue) to completely heal the affected area
then when everything is healed the regenerated surface will have the fibrosis (the scar) that maybe visible Tissue is very important, why shouldn't it be we're made of it.
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