echinoderms also known as segmented worms, have a closed circulatory system. cni

Question

echinoderms also known as segmented worms, have a closed circulatory system. cnidarians l2 have jointed appendages and an exoskeleton that must be shed to permit growth. molluscs exhibit two radial body forms, the polyp and the medusa, and use stinging cels to arthropods capture prey. flatworms (meaning "spiny skin") have a water vascular system that functions in locomotion, annelids feeding, and gas exchange. Sponges are the simplest bilaterian animals and lack a body cavity. nematodes have a body plan with three main parts: a visceral mass, a mantle, and a foot have a pseudocoelom and are the simplest animals that have a complete digestive are sessile animals that have specialized cells called amoebocytes and choanocytes My Answers Give Up

Explanation / Answer

Annelids- Also known as segmented worms, have a closed circulatory system.
Arthropods- Have jointed appendages and an exoskeleton that must be shed to permit growth.

Cnidarians- Exhibit two radial body forms, the polyp and the medusa, and use stinging cells to capture prey.

Echinoderms- (meaning "spiny skin"), have a water vascular system that functions in locomotion, feeding, and gas exchange.

Flatworms- Simplest bilaterian animals, lack a body cavity.

Molluscs- Have a body plan with three main parts: a visceral mass, a mantle, and a foot.

Nematodes- Have a pseudocoelom and are the simplest animals that have a complete digestive tract.

Sponges- Sessile animals that have specialized cells called amoebocytes and choanocytes.

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