AP BIOLOGY

Detailed explanation-1: -Hydrostatic skeletons are very common in invertebrates. A common example is the earthworm. Also, hydrostatic nature is common in marine life such as jelly fish and sea anemones. Earthworms have rings of muscles that are filled with fluid, making their entire body hydrostatic.

Detailed explanation-2: -Hydrostatic skeleton: Skeletal support provided by hydrostatic pressure from a fluid filled cavity (e.g. the coelum) surrounded by muscles. Hydrostatic pressure provides skeletal support in sea anemones, jellyfish, nematodes, annelids, echinoderms, and other groups.

Detailed explanation-3: -Hydrostatic Skeleton This type of skeletal system is found in soft-bodied animals such as sea anemones, earthworms, Cnidaria, and other invertebrates (Figure 1). Movement in a hydrostatic skeleton is provided by muscles that surround the coelom.

Detailed explanation-4: -Jellyfish have hydrostatic skeletons Rather than a skeleton made up of bones, jellyfish have bells containing fluid and circular muscles.

Detailed explanation-5: -Porifera (sponges) and cnidarians (jellyfish) are invertebrates that have a form of endoskeleton called a hydrostatic skeleton. Instead of bone or cartilage, it consists of a cavity called the coelom, which is filled with a gelatinous substance called mesohyl, and is supported by fluid pressure.