Which of the following is not considered a method of energy extraction from food?
a. digestion, absorption, and transport
b. extraction from the intestine
c. transfer of energy to a form the cells can use
d. breakdown of many small molecules to a few key metabolites

the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.

not sure if this is what you'r looking for eubacteria and archaebacteria

all matter is made up of atoms

in any element all atoms are the same

elements in a compound are always in a constant ratio: apex

the most common type of reef is the fringing reef. this type of reef grows seaward directly from the shore. they form borders along the shoreline and surrounding islands.