Does a clam have a endoskeleton or exoskeleton?

Answer 1

Starfish have an endoskeleton that consists of calcium carbonite plates. These plates are covered in a thin skin layer, making them endo or under the skin. An exoskeleton would be like that of a crab (an outer shell/ no skin over it). Starfish dont have a backbone.

Answer 2

The mesohyl functions as an endoskeleton in most sponges, and is the only skeleton in soft sponges that encrust hard surfaces such as rocks. More commonly, the mesohyl is stiffened by mineral spicules, by spongin fibers or both. Some species use calcium carbonate exoskeletons.

Exoskeletons, are restricted to relatively shallow marine waters where production of calcium carbonate is easiest.

Mesohyl-gelatinous matrix within a sponge. It fills the space between the external pinacoderm and the internal choanoderm. The mesohyl resembles a type of connective tissue.

Answer 3

exoskeletons are bones lost. sponges have cotten,holes,and stuff to holed water and sutch

Answer 4

Fish have endoskeletons. Their skeletons are on the inside of their body.

Answer 5

Neither. No bones at all.

Answer 6

Oof