A. Define the following:
1. Nervous System:
2. Spinal Cord :
3. Nerves :
4. Cerebrum :
Answers
1)the network of nerve cells and fibres which transmits nerve impulses between parts of the body.
2)The spinal cord is a long, thin, tubular structure made up of nervous tissue, which extends from the medulla oblongata in the brainstem to the lumbar region of the vertebral column. It encloses the central canal of the spinal cord, which contains cerebrospinal fluid.
3)A nerve is an enclosed, cable-like bundle of nerve fibres called axons, in the peripheral nervous system. A nerve transmits electrical impulses and is the basic unit of the peripheral nervous system.
4)The cerebrum is the largest part of the brain, located superiorly and anteriorly in relation to the brainstem. It consists of two cerebral hemispheres (left and right), separated by the falx cerebri of the dura mater. Embryologically, the cerebrum is derived from the prosencephalon.
Answer:
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Explanation:
Nervous system_ the network of nerve cells and fibres which transmits nerve impulses between parts of the body.
Spinal cord_ The spinal cord is a long, thin, tubular structure made up of nervous tissue, which extends from the medulla oblongata in the brainstem to the lumbar region of the vertebral column. It encloses the central canal of the spinal cord, which contains cerebrospinal fluid.
Nerves_one of the long thin threads in your body that carry feelings or other messages to and from your brain.
Cerebrum_the principal and most anterior part of the brain in vertebrates, located in the front area of the skull and consisting of two hemispheres, left and right, separated by a fissure.
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