The process of removing waste products and other elements from the blood is known as:

The process of removing waste products and other elements from the blood is referred to as excretion. This involves the kidneys filtering blood to remove waste products such as urea, toxins, and excess substances, which are then excreted in urine. Excretion plays a crucial role in maintaining homeostasis in the body by regulating the composition of blood and other bodily fluids.

While secretion refers to the process of producing and releasing substances such as hormones or enzymes from glands, and elimination is a more general term that may apply to various aspects of waste removal from the body, excretion specifically addresses the renal functions related to filtering and removing waste from the bloodstream. The term ptosis generally refers to the drooping of a body part, such as a fallen organ, and is not related to waste removal. Therefore, excretion is the most accurate term for this specific biological process.