The human nervous system is broken up into central and peripheral parts. the central system (cns) is made up of
a. the brain and the spinal cord
b. sensory and motor neurons
c. the brain and motor neurons

The answer is a. the brain and the spinal cord

The two main parts of the central nervous system are brain and spinal cord. The spinal cord serves as the main communication link between the body and the brain. The spinal cord receives information from the body and relays it to the brain, and vice versa, it receives information from the brain and relays it out to the effectors.

the unequal cytoplasmic division that  results  in  one egg  and three polar bodies ensures that a fertilized  egg has  ample nutrients  forits journey  to  the uterus.