How many legs does a water bear have?

8

Explanation:

8 legs! Tardigrades have long, plump bodies and eight stubby legs. They're closely related to insects and crustaceans but look a bit like pigs or bears — and are sometimes called “water bears.”

it enhances antibody production by t cells of the adaptive immune system.

hope i'm right

explanation:

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.