Question

Connective tissue membranes differ from cutaneous and serous membranes in that they ________.

1) are not found in the body
2) are only found in the skin
3) are only found in the internal organs
4) are composed of different types of cells and tissues

Answer 1

Connective tissue membranes are made solely of connective tissue and include synovial membranes that line movable joints, whereas epithelial membranes like cutaneous and serous membranes are combinations of epithelial and connective tissues, serving protective and secretory functions.

Step-by-step explanation:

Connective tissue membranes are exclusively formed from connective tissue. An example of such a membrane is the synovial membrane, which lines the cavity of freely movable joints like the shoulders, elbows, and knees. These membranes do not cover external surfaces or internal cavities that lead to the exterior; they encapsulate organs and enable smooth and frictionless joint movements by secreting synovial fluid, which acts as a lubricant.

In contrast, epithelial membranes comprise epithelial tissue combined with an underlying layer of connective tissue. Epithelial membranes include the mucous membranes that contain glands, serous membranes that secrete a fluid to reduce friction, and the cutaneous membrane, which is essentially the skin. These membranes serve various functions such as protection, secretion, and absorption, and they line both the external surfaces of the body and internal passageways.