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Four Primary Tissues

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1. The four primary tissues of the human body, epithelial, connective, muscular, and nervous tissue. Epithelial tissue functions as a covering or lining for the internal organs found throughout the body as skin, in the digestive tract absorbing nutrients, and lining the inside of blood vessels. As a glandular tissue that excretes substances for waste or for bodily uses of the exocrine/endocrine systems. Connective tissue is the most abundant tissue found in the body, ranging from tendon and ligaments connecting bones together, bones for structural support. Muscular tissue provide movement for the body, contracting muscles by reacting to stimulus, providing thermal regulation. Nervous tissue is found in the brain, spinal cord, and peripheral …show more content…

Exocrine gland release substances through ducts or tubes that lead the external surface of the membrane, sweat glands, saliva, or the gastrointestinal tract. Endocrine gland doesn’t have any duct that lead to the surface, it diffuses its secretion into the bloodstream.
4. Different types of muscles. Smooth muscle cells are shaped in spindles with single nucleus, have involuntary movement through the body and do not have any striation. Smooth muscle can be found in digestive system, urinary tract. Muscular cells are found as bundles, with striation and are multiple nucleus found along the membrane surface. Cardiac muscle cells are only found in the heart, the cells short, branched with a centrally located, single nucleus and are striated with intercalated disc found between to speed up the electrical conduct of the heart rhythm without external stimulus.
5. There are two types of nervous system cells, they receive and send electrochemical responses to the body. Neuron cells are the conducting cells of the nervous system. Neurons have a cell body with dendrites branching from the main body, an axon which is the long tail that extends from the main body that is wrapped in myelin to create a protective sheath around the axon that also helps speed the neurotransmissions. The glial cell is the supporting cells of the

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