The neural system of all animals is composed of highly specialised cells called neurons which can detect, receive and transmit different kinds of stimuli. The neural organisation is very simple in lower invertebrates. For example, in Hydra it is composed of a network of neurons. The neural system is better organised in nsects, where a brain is present along with a number of ganglia and neural tissues. The vertebrates have a more developed neural system.
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sir Pls complete this playlist before January, bcoz time is very short and we have to revise things.
Sir apne jo cells btai na jo myelin sheath form krti hai unki spelling kya hai???? Swam cell ya kuch or???