Tissues

Tissues are groups of cells that have a similar structure and act together to perform a specific function. They can be found in plants and animals. In humans, there are four basic types of tissue: epithelial tissue, connective tissue, muscle tissue, and nervous tissue.

Epithelial Tissue

Epithelial tissue covers the whole surface of the body. It is made up of cells closely packed and ranged in one or more layers. This tissue is specialized to form the covering or lining of all internal and external body surfaces.

Connective Tissue

Connective tissue is the most abundant and widely distributed of the primary tissues. Its roles include connecting and binding different parts of the body, providing support and protection, and filling spaces.

Muscle Tissue

Muscle tissue is a soft tissue that composes muscles in animal bodies, and gives rise to muscles' ability to contract. This is opposed to other components or tissues in muscle such as tendons or perimysium.

Nervous Tissue

Nervous tissue is the main component of the nervous system, which includes the brain, spinal cord, and nerves. Nervous tissue is responsible for sensing stimuli and transmitting signals to and from different parts of an organism.

See Also

• Cell (biology)
• Organ (anatomy)
• Organ system
• Histology

References

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