In order to approve a research project involving human subjects, the IRB must assure itself that (1) the prospective subject population is appropriate in terms of characteristics and number, (2) the recruitment of subjects is free of coercion, (3) the experimental design of the study is sound, (4) any risks associated

cell regulation is conducted by special proteins.

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.

ya the other dude is right