"46. the largest number of neurons within the brain and spinal cord are ; they are responsible for the central nervous system's complex internal communications system and mediate between inputs and outputs. a) motor neurons b) sensory neurons c) interneurons d) afferent neurons"

An organ system consists of a group of organs that performs specific functions necessary for the survival of an organism. humans have eleven different organ systems: integumentary, skeletal, muscular, nervous, endocrine, circulatory, lymphatic, respiratory, digestive, urinary, and reproductive. discuss the function of neurons, the brain and the spinal cord within the human nervous system while explaining the interrelationship of each organ.

Which type of neuron stimulates muscles to contract?

What happens to the amount of waste in the pond as the ecosystem ages?