Critically evaluate this statement: It's paranoid to worry about contaminating the environment with chemical wastes; this stuff
is just made of the same atoms that were already present in our
environment

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.

cell division is not regulated in tumor cells.

other information encoded in your genes might distinguish you from the others in the group