3. MUSCULAR. Muscular tissue provides for all body movement. There are two types, voluntary and involuntary.
Figure 3-8.—Striated (voluntary) muscle.
a. Voluntary muscle fibers are striated, or striped, and are under the control of the individual’s will (fig. 3-8). Muscles that attach to bone are voluntary muscles.
Figure 3-9.—Non-striated (involuntary) muscle.
b. Involuntary muscle fibers are smooth, or nonstriated, and are not under the control of the individual’s will (fig. 3-9). The muscles of the stomach are an example.
Figure 3-10.—Cardiac muscle.
NOTE: Composed of a special branched type of cell, the heart (cardiac) muscle is an involun- tary muscles that is striated (fig. 3-10).
4. LIQUID. Liquid tissues act as a medium for supplying the body with nutrients and as a vehicle for eliminating waste material. They form the blood, lymph, and tissue fluids.
5. NERVOUS. Nervous tissue is the most complex tissue in the body. It is the sub- stance of the brain, spinal cord, and nerves. Nervous tissue requires more oxygen and
