Mucous

Question 1

Mucous Membranes (Mucosa)

Answer 1

Location: Line body cavities that open to the outside (e.g., mouth, nose, lungs, stomach, intestines, urinary tract).
Function: Protect, lubricate, and trap debris/pathogens.
Secretion: Mucus (thick, sticky fluid for moisture and protection).
Example: Lining of the digestive and respiratory tracts.

Question 2

Serous Membranes (Serosa)

Answer 2

Location: Line body cavities that do not open to the outside and cover internal organs (e.g., lungs, heart, abdominal organs).
Function: Reduce friction between moving organs.
Secretion: Serous fluid (thin, watery fluid for lubrication).
Example: Pleura (lungs), Pericardium (heart), Peritoneum (abdominal organs).

Question 3

Synovial Membranes

Answer 3

Location: Line joint cavities (e.g., knees, elbows, shoulders).
Function: Reduce friction between bones in movable joints.
Secretion: Synovial fluid (lubricates and nourishes cartilage).
Example: Found in synovial joints like the knee and shoulder.