Quiz: Test Your Knowledge About Phylum Hemichordata

Hemichordata is a phylum of marine animal and it is considered as the sister of Echinodermata. They have an organ-system level of organization. The notochord is absent many taxonomists do not consider this animal as chordates body of hemichordate is divisible into proboscis, collar, and trunk. They have a digestive system with open mouth and ciliary feeders. They feed on planktons, sand, and mud to digest organic matter from it there is a preoral extension of the gut called stomochord in proboscis region. They respire through U shaped dorso-ventral pharyngeal gill slits. Single glomerulus in probosci's act as an excretory organ. Sensory cells in the epidermis. Their larva is Tornaria because of its habit of rotating in a circle. Tornaria resembles bipinnaria of echinoderms and is a connecting link between echinoderms and chordates. So take this quiz and test your knowledge about phylum Hemichordate.