Define Osmosis and Diffusion AND explain the difference between the two. please need help

Blood has traveled from the heart to the toes. which describes the next step of the circulation process?

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.

20 the compound al(nh3)2 has atoms of nitrogen.