Q. Nematode identity card. How are nematodes characterized according to examples of representing beings, type of symmetry basic morphology, , germ layers and coelom, digestive system, , circulatory system, respiratory system excretory system, nervous system and types of reproduction?

Examples of representing beings, hookworms, ascaris, filaria, pinworms. Basic morphology: cylindric (round) body not segmented. Type of symmetry: bilateral, Germ layers and coelom: triploblastics, pseudocoelomates. Digestive system: complete, Respiratory system: respiration by diffusion, Circulatory system: circulating fluid within the pseudocoelom. Excretory system: excretory channels and excretory pore, Nervous system: dorsal ganglial chord and ventral, primitive cephalization. kind of reproduction: sexual.