Tại sao nói tế bào là đơn vị chức năng của sự sống

The pharynx is the structure in the body that serves as a pathway of both air and food. how does the body make sure that food does not get into the lungs? the salivary glands secrete enzymes that pull food out of the air pathway. the small intestine pushes the air out of the digestive system. the pancreas breaks down food in the air pathway. the epiglottis closes the air pathway so that food will not enter it.

_is a product of the first stage of photosynthesis.atpglucosecarbon dioxidewater

Identify two examples of chemical reactions that you have encountered during the last week. identify an exothermic and endothermic reaction. explain.