AP BIOLOGY

Detailed explanation-1: -Echinodermata are named for their spiny skin (from the Greek “echinos” meaning “spiny” and “dermos” meaning “skin”). The phylum includes about 7, 0001 described living species, such as sea stars, sea cucumbers, sea urchins, sand dollars, and brittle stars. Echinodermata are exclusively marine.

Detailed explanation-2: -Answer: The echinoderms belong to the phylum Echinodermata and subphylum Deuterostomia. Phylum Echinodermata belongs to kingdom Animalia, they are triploblastic animals. Examples of echinoderms include sea star, sea urchins etc.

Detailed explanation-3: -Sea stars and their cousins belong to a group called Echinoderms. Echinoderm means spiny skin. If we break the word down echino = spiny and derm= skin, so these animals are spiny-skinned. Sea stars and their cousins are part of a group of spiny-skinned animals. Sea Stars: Most sea stars have five arms.

Detailed explanation-4: -The name Echinodermata, “those having hedgehog-like skin, ” was coined by the German jurist and naturalist Jacob Theodor Klein (1685-1759) in Naturalis dispositio Echinodermatum (Danzig, 1734). First Known Use. 1835, in the meaning defined above.

Detailed explanation-5: -Structure and Function of Echinoderms. Echinoderms are named for their “spiny skin.” However, the spines aren’t on their skin. They are part of the endoskeleton. The endoskeleton consists of calcium carbonate plates and spines, covered by a thin layer of skin.