External Anatomy Of A Starfish

These are found in the pacific atlantic indian and even the arctic and southern oceans. Dorsal view of a dissected starfish showing pyloric cecum and pyloric ducts.

Starfish Dissection Biology Junction

Respiratory and excretory system 12.

External anatomy of a starfish. Some sea stars like the crown of thorns starfish have large spines. In this article we will discuss about asterias starfish 1. Ventral view of starfish showing external anatomy.

This species is also known as sea star. Habit and habitat of asterias 3. A 2014 analysis of 219 genes from all classes of echinoderms gives the following phylogenetic tree.

History of asterias 2. Many sea stars have five arms but some species may have up to 40. These arms are often covered with spines for protection.

Water vascular system 9. The times at which the clades diverged is shown under the labels in millions of years ago mya. Close up of madreporite and stone canal.

In this book full color photos create a visual dictionary of the key external anatomy of a starfish a species of sea star an echinoderm including its central disk arms mouth tubed feet and tentacles. Others eg blood stars have spines so small that their skin appears smooth. Dorsal view of a dissected starfish showing gonads and ampullae.

Start studying starfish anatomy externalinternal. Anatomy is the study of the internal and external structures present in an organism. Learn vocabulary terms and more with flashcards games and other study tools.

Starfish are echinoderms and belong to the class asteroidea. Asteris arm microscopic xs. Dissection showing where cardiac stomach opens into the mouth.

Starfish are deuterostome animals like the chordates.

Ap Bio Squad P2 3a Ap Biology Final Project Starfish