Reabsorption vs. Filtration — What's the Difference?

In renal physiology, reabsorption or tubular reabsorption is the process by which the nephron removes water and solutes from the tubular fluid (pre-urine) and returns them to the circulating blood. It is called reabsorption (and not absorption) both because these substances have already been absorbed once (particularly in the intestines) and because the body is reclaiming them from a postglomerular fluid stream that is well on its way to becoming urine (that is, they will soon be lost to the urine unless they are reclaimed).

Filtration is a physical or chemical separation process that separates solid matter and fluid from a mixture using a filter medium that has a complex structure through which only the fluid can pass. Solid particles that cannot pass through the filter medium are described as oversize and the fluid that passes through is called the filtrate.

The process of absorbing something again

The action or process of filtering something

To absorb again.

The act or process of filtering.

To accommodate or accept again, as into a group or category

The act or process of filtering; the mechanical separation of a liquid from the undissolved particles floating in it.

To undergo resorption.

A totally ordered collection of subsets.

(physics) The subsequent absorption of emitted radiation.

The act or process of filtering; the mechanical separation of a liquid from the undissolved particles floating in it.

(physiology) The subsequent absorption of a secreted substance.

The process whereby fluids pass through a filter or a filtering medium

The act or process of reabsorbing.

The act of changing a fluid by passing it through a filter

The organic process in which the substance of some differentiated structure that has been produced by the body undergoes lysis and assimilation