Answer:There are four steps in the digestion process: ingestion, the mechanical and chemical breakdown of food, nutrient absorption, and elimination of indigestible food.
Explanation:
Answer:
takes substances captured from the external environment (air and carbon sources) and converts them into energy for building more cells and tissues and for carrying out life-sustaining activities. It also generates waste products and water.
Explanation:
For the first question the answer is C the second one the answer is A
Answer:
because the frog is not really persons that the reasons why frog less the circulatory sysyem
Skeletal and Muscular Systems
