The main features of annelids. How can they 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?
Examples of representative species: earthworms, leeches, lugworms. simple morphology: cylindrical body, segmented (metameric). type of symmetry: bilateral. Germ layers and coelom: triploblastic, coelomates. Digestive machine: entire. respiratory system: cutaneous or branchial. Circulatory device: closed, with hemoglobin. Excretory system: a pair of metanephridia in every metamere. fearful machine: neural cords, a pair of ganglia according to metamere, anterior concentration of neurons (primitive brain). sorts of duplicate: sexual, with dioecious and monoecious species.
Get Answers For Free
Most questions answered within 1 hours.