Page 23 - Chapter 3: Cells and Tissues

a) Regeneration. -Refers to the replacement of injured tissue by cells
that are identical to the original cells. Occurs only in tissues whose
cell undergo mitosis, such as the skin

b) Fibrosis. - Is the replacement of the injured tissue by the
formation of fibrous connective tissue, or scar tissue. The fibers of
scar tissue pull the edges of the wound together and strengthen the area.
Damaged skeletal muscle, cardiac muscle, and nervous tissue are
replaced by scar tissue.

G. Membranes

Membranes are thin sheets of tissue that cover surfaces, line body
cavities, and surround organs.

1. Epithelial membranes
a. Cutaneous (skin): -The outer layer of the skin

b. Mucous Membranes-Secret mucus to keep the membrane moist
and also lubricated.

i. Line all cavities that open to the outside
ii. Examples: digestive tract, respiratory tract, genitourinary tracts

c. Serous membranes

Serous membranes secrete a thin, watery, serous fluid. The fluid
allows the membrane to slide past one another with little
friction.