Which type ir organism converts wastes and dead materials into nutrients that can be used by plants

The answer is Decomposers.

If I assume correctly you r talking about different types of consumers. The type of consumers you r referring to are called decomposers.

examples include bacteria, worms, insects, and vultures

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.