C. Muscle Tissues Skeletal muscle tissue (“voluntary”) Long, threadlike cells Striations: alternating light and dark cross-markings Each cell has many nuclei just beneath the cell membrane.
Muscle Tissues (cont.) 2. Smooth muscle tissue (“involuntary”) No striations Cells are shorter than skeletal muscle, spindle-shaped, and have one, centrally located nucleus. Line walls of internal organs
Muscle Tissues (cont.) 3. Cardiac muscle tissue – heart Striated and joined end-to-end Each cell has only one nucleus. ??? How would you be able to differentiate b/t skeletal and cardiac muscle tissue, since both are striated?
D. Nervous Tissue Nervous tissue is See Table 5.5, p.107!!! found in the brain, spinal cord, and nerves. made up of: Neurons: nerve cells Neuroglial cells: helper cells “glia” = glue Support and bind components of nervous tissue to each other and to blood vessels See Table 5.5, p.107!!!