Main tissues in the body and their role

Topics: Bone, Muscle, Blood Pages: 2 (315 words) Published: December 5, 2014

Main tissues in the body and their roles

Epithelial: Forms the coverings of surfaces of the body. It serves many purposes, including protection, absorption, excretion, secretion, filtration, and sensory reception.

Simple – Single layered tissue which rest upon the basement membrane. It occurs on the secretory and absorptive surfaces.

Compound – Consists of more than two layers and the deepest layer rests on the basement membrane. With it being multilayered it doesn’t perform the role of secretion or absorption. Instead it functions as a protective layer against mechanical, chemical, thermal and osmotic stress.

Muscle: Muscle tissues are made up of muscle fibres which contain many myofibrils; these are the parts of the fibre that actually contract. There are three types: skeletal, cardiac and smooth.

Skeletal – attached to bones and causes movement of the body. Cardiac – found in the heart.
Smooth – lines the walls of blood vessels and certain organs such as the digestive and urogenital tracts.

Nervous: The nervous system is responsible for coordinating the activities and movements of your body. Parts of the nervous system include the brain, spinal cord and nerves. Nervous tissue consists of two kinds of nervous cells:

Neurons - the basic structural unit of the nervous system. Each cell consists of the cell body, dendrites, and axon.

Neuroglia/glial cells - provide support functions for the neurons, such as insulation or anchoring neurons to blood vessels.

Connective: Connective tissue provides structure and support to the body. There are two types of connective tissue:

Loose connective - holds structures together. For example, loose connective tissue holds the outer layer of skin to the underlying muscle tissue. This tissue is also found in your fat layers, lymph nodes, and red bone marrow.

Fibrous connective - also holds body parts together but its structure is a bit more rigid than loose connective tissue....
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