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Animal tissues - Coggle Diagram
Animal tissues
Epithelial
Squamous
flat square shaped cells with a central nucleus. They allow diffusion and filtration and thus are located in the kidneys, blood vessels, alveoli etc.
Cuboidal
They are as flat as they are wide. They secrete, absorb and excrete substances. They are found in the kidneys, pancreas, salivary glands etc.
Columnar
They are pillar-like cells that have a central nucleus. They help in secretion and absorption and thus line the stomach and intestines
Ciliated
They have small cell extensions i.e. cilia. They help in the motion of various substances and are located in the oesophagus.
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Stratified
Here, there are various layers of epithelium layers. They provide resistance to mechanical injuries and abrasion. They are located in parts that are suceptible to these damages like our external skin
Connective
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Supportive tissue
bone
Osteoblasts, osteocytes, osteoclasts and bone lining cells.
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Matrix is made up of Ossein, mineral salts like calcium phosphate, calcium carbonate, NaCl, magnesium phosphate
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Muscle tissue
Striated
They show dark and light bands of striations in them. They are voluntary and get fatigued very easily. They are multi-nucleated and are branched.
Smooth
They are smooth and are involuntary muscles. They can remain contracted for a long time and don't get fatigued easily. They are uni-nucleated and unbranched
Cardiac
They are involuntary muscles located in the heart. They never get fatigued and require a high blood flow. They are branched and uni-nucleated. They show faint striations that carry the electrical impulses called intercalated discs
Nervous tissue
Dendrites, cyton, axon, axon terminal
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