Terms

Question 1

the main body cavity in most animals and is positioned inside the body to surround and contain the digestive tract and other organs. In some animals, it is lined with mesothelium. In other animals, such as molluscs, it remains undifferentiated.

Answer 1

The coelom (or celom)

Question 2

the serous membrane forming the lining of the abdominal cavity or coelom in amniotes and some invertebrates, such as annelids. It covers most of the intra-abdominal (or coelomic) organs, and is composed of a layer of mesothelium supported by a thin layer of connective tissue.

Answer 2

The peritoneum

Question 3

of, relating to, producing, or resembling serum especially : having a thin watery constitution a serous exudate

Answer 3

serous

Question 4

may be indicated for the accumulation of fluid within one or more of the peritoneal cavities.

Answer 4

Abdominocentesis or coelomocentesis