What is the anatomy of a starfish?
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Starfish Anatomy
Starfish exhibit radial symmetry, meaning that their arms are arranged evenly in a circle around a central disc - like spokes on a bike wheel. Although starfish don't have eyes or even a brain for that matter, they do have one sensory tentacle at the end of each arm.
Correspondingly, what are the body parts of a starfish?
Starfish
- Internal anatomy of a starfish: marine animal with radiating symmetry.
- Sieve plate: entrance to the water-vascular system of a starfish.
- Anus: end of the digestive tract of a starfish.
- Rectal cecum: cul-de-sac related to the rectum.
- Ray: limb of a starfish.
- Ring canal: tube that forms a ring of a starfish.
Furthermore, how many hearts does a starfish have?
Sea Stars have five or more arms while humans have one. Sea Stars have spikes on their outer covering. They do not have a circulatory system because they do not have a heart or blood that circulates nutrients. Sea Stars have two stomachs while humans only have one.
Characteristics of sea stars (or starfish) Sea stars are characterized by radial symmetry, several arms (5 or multiplied by 5) radiating from a central body. Mouth and anus are close together on the underside, the anus is at the center of the disc together with the water intake (madreporite).