of or relating to a substance that is useful in the suppression of nausea or vomiting. noun. 2. any such substance. Origin of antiemetic. anti- + emetic.
Sea anemones are a group of water-dwelling, predatory animals of the order Actiniaria. They are named for the anemone, a terrestrial flower.Sea anemones are classified in the phylum Cnidaria, class Anthozoa, subclass Hexacorallia. sea anemone is a sessile polyp attached at the bottom to the surface beneath it by an adhesive foot, called a basal disc, with a column-shaped body ending in an oral disc.
sponges are the simplest form of multi cellular animals they are very diverse and come in a large variety of colours shapes and structural complexities they range in heights of 1 200cm and in diameters of 1 150cmthey have partially differentiated tissues and not true tissuessponges don t have internal organsthey don t have muscles a nervous system or a circulatory system their walls are lined with many small pores called ostia that allow water flow into the sponge the structure of a sponge is simpleone end is attached to a solid such as a rock while the other end called the osculum is open to the environment sponges are able to get microorganisms such as algae and bacteria for food through openingshe structure of a sponge is simple one end is attached to a solid such as a rock while the other end called the osculum is open to the environment sponges are able to get microorganisms such as algae and bacteria for food through openings