GENERAL HISTOLOGY

Detailed explanation-1: -Echinoderms possess a simple digestive system which varies according to the animal’s diet. Starfish are mostly carnivorous and have a mouth, oesophagus, two-part stomach, intestine and rectum, with the anus located in the centre of the aboral body surface.

Detailed explanation-2: -Members of the Echinodermata-the phylum of ocean invertebrates-can be carnivores, omnivores, or herbivores. They can be active predators or passive filter feeders. Their digestive systems are relatively similar, and include four main parts: a mouth, stomach, intestines, and anus.

Detailed explanation-3: -Some echinoderms are carnivorous (for example starfish) others are detritus foragers (for example some sea cucumbers) or planktonic feeders (for example basket stars). Reproduction is carried out by the release of sperm and eggs into the water.

Detailed explanation-4: -Echinoderms are strictly marine with a variety of feeding modes including detritivores, herbivores, predators and filter feeders.