Plz ! when you exercise, your muscles are hard at work! to allow your muscles to do all that work, they need more nutrients and oxygen delivered to them so they will have the energy they need. which body system supply them with those necessary things? a. digestive and respiratory b. circulatory and respiratory c. circulatory and excretory d. respiratory and skeletal

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.

Nerve cells are specialized to respond to stimulitrue or false?

What substance is the most acidic. lemon juice. tomato juice. sodium hydroxide. water