The breakdown of food is accomplished by enzymes. a. physical b. chemical c. mechanical d. none of the above

What best describes lactic acid fermentation?

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.

Number and variety of living organism; includes genetic, species, and ecological types