Tissues and Integumentary System
1. Describe the characteristics of epithelial tissue. (5 points)
The most basic characteristics of the epithelial tissue is that it covers the surfaces of the body whether internal or external. It acts as a protective covering or boundary for such surfaces, including the outer layer of the skin, as well as the inner surface of the hallow organs like the stomach, colon, and blood vessels. Other characteristics is that it is made almost entirely of cells, contains cells joined by specialized contacts, has distinct upper and lower surfaces, is not supported by blood cells, retains the ability to regenerate, and is supported by connective tissue.
2. Describe the characteristics of connective tissue. (5 points) Connective tissue is found in all parts of the body as discrete structures or as part of various body organs. It is the most abundant and widely distributed of the tissue types. Connective tissues perform a variety of functions, but they primarily protect, support, and bind together other tissues of the body. The characteristics of connective tissue include having a rich supply of blood vessels, they are composed of many types of cells, and there is a great deal of noncellular, nonliving material between the cells of connective tissue.
3. Describe the characteristics of nervous tissue. (5 points)
The nervous tissue is composed of tow major cell populations. The neuroglia are special supporting cells that protect, support, and insulate the more delicate neurons. The neurons are highly specialized to receive stimuli and to conduct waves of excitation, or impulses, to all parts of the body. They are the cells that are most aftern associated with nervous system functioning.
4. Describe the various appendages of the skin and their structure. (5 points)
In humans, the most common appendages are hairs used for sensation, heat loss, filter for breathing and protection. Another skin