what are the lower chambers of the heart called?
what separates the heart?
what are the upper chambers of the heart called?
what beats first, the atrium or ventricle?
receiving blood from the body that is low in oxygen and pumping it to the lungs
what is the right side of the heart responsible for?
pumps oxygen rich blood from the lungs to the rest of the body
what is the left side of the heart responsible for?
the sinoatrial node
what is the pacemaker?
carry blood from the heart to the rest of the body
what are arteries?
what is the LARGEST artery?
merged capillaries that send blood back to the blood
what are veins?
the vena cava
what is the LARGEST vein?
smallest branch of arteries that transfer blood to the tissue
what are capillaries?
plasma, red blood cells, white blood cells, and platelets.
what are the four components of bood?
pharnx, larynx and trachea, bronchi and lungs, alveoli
what are the respiratory organs?
how does food move through the esophagus?
fluid in the stomach
a enzyme that breaks down protein into amino acids
what is pepsin?
what are the small blood vessels in the small intestine?
what stops food from entering your lungs and is located at the pharynx?