Human nervous system
Human Nervous System 1) Central Nervous System(C.N.S). 2) Peripheral Nervous System(P.N.S) 3) Autonomic Nervous System(A.N.S) C.N.S- Brain and spinal cord P.N.S- Cranial Nerves and spinal nerves. A.N.S- Ganglion cells that help involuntary action. Brain •It is a delicate organ present in a bony box called Cranium. •Cranium protects the brain from injury and mechanical shocks. •Brain has three membranes: Arachnoid, Pia mater and dura mater. •The fluid-filled b/w the membranes is Cerebrospinal Fluid. • Brain has two hemispheres Called Cerebral hemispheres joined by Corpus Callosum The brain has classified into three parts 1) Forebrain 2) Midbrain 3) Hindbrain Forebrain three parts • Hypothalamus • Cerebrum • Olfactory Cerebrum- It is the centre of thinking, memory, intelligence, Learning, reasoning and creativity etc. Olfactory- It has a centre of smell. Midbrain It is a centre of visual (seeing) and auditory (liste...