Question

Briefly describe the skeletal support systems in nematodes, lobsters, and raccoons and explain how they use them to help move around.

Answer 1

Answer-

According to the given question-

Nematode are belongs to phylum nematoda and they have reproductive system, nervous system, digestive system and excretory system but don't have respiratory and circulatory system.

They have pseudocoelom and have hydrostatic support system. They have a cuticle present which cover them from outside and also support, helps in movement and provide shape to their body. Cuticle is flexible and tough. So hydrostatic skeleton and cuticle both helps in movement.

Lobster are crustaceans belongs to phylum arthropoda and are generally lived in Aqua environment. They have exoskeleton called shell shell is made up of chitin and provide protection.

Lobster slowly walk and they crawl with the help of their legs.

Raccoons are mammals, belongs to phylum chordata and have endoskeleton.

skeletal system of raccoons provide them free movement of the front and back limbs.

They have shoulders, bones which provide them shape and also helps in movement. They can move on their four legs, but generally sit on rear legs.

So here we have three types of skeleton support system such as hydrostatic skeleton support system found in nematode which is a fluid type support , in crustaceans they have exoskeleton made up of chitin , in raccoon a mammal which have endoskeleton support system.