Describe the difference between an embryo and a fetus. when in gestation does this change happen?

What happens when the cell copies its chromosomes

Aflashlight battery is an example of a) potential energy b) kinetic energy c) thermal energy d) solar energy

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.