Question

The main features of echinoderms. How can echinoderms be described according to examples of representative species,...

The main features of echinoderms. How can echinoderms be described according to examples of representative species, basic morphology, type of symmetry, germ layers and coelom, digestive system, respiratory system, circulatory system, excretory system, nervous system and types of reproduction?

Homework Answers

Answer #1

Examples of representing beings: sea cucumber, sea urchin, star fish

Basic morphology: calcareous endoskeleton with spines, ambulacral system

Type of symmetry: secondary radial

Germ layers and coelom: triploblastics, coelomates

Digestive system: complete, deuterostomes

Respiratory system: non-existent

Circulatory system : non-existent

Excretory system: non-existent

Nervous system: simple, nerve network without ganglia or cephalization

Types of reproduction: sexual with a larval stage

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