AP BIOLOGY

Detailed explanation-1: -Hydrostatic skeletons are fluid-filled columns, or cavities, inside invertebrates, including jellyfish, flatworms, nematodes, and annelids such as earthworms. Muscles and connective tissue form a tough body wall around the cavity, explains Bill Kier, a biologist at the University of North Carolina.

Detailed explanation-2: -A hydrostatic skeleton is a skeleton formed by a fluid-filled compartment within the body, called the coelom. The organs of the coelom are supported by the aqueous fluid, which also resists external compression.

Detailed explanation-3: -A hydrostatic skeleton is formed by a fluid-filled compartment held under hydrostatic pressure; movement is created by the muscles producing pressure on the fluid.

Detailed explanation-4: -The digestive, reproductive, nervous, and excretory systems are contained inside the body wall. The body wall is referred to as “hydrostatic skeleton” because it is held rigid by pressure from the interior organs.

Detailed explanation-5: -Hydrostatic Skeletons. A hydrostatic skeleton is a structure found in many cold-blooded and soft-bodied organisms. It consists of a fluid-filled cavity, which is surrounded by muscles. The cavity is called a coelom and in some animals, this cavity is filled with a blood-like substance called haemocoel.