The afferent arteriole.
Capillary: A tiny blood vessel where substances are exchanged between the blood and the body cells.
Capillaries via osmosis
nephron
Capillaries
Capillary. The thin walls allow diffusion of materials to pass from the blood flow into the nephron.
There's the afferent arteriole which goes to the glomerulus and the efferent arterioles which comes out of the glomerulus. These arterioles then branch out surrounding the nephron, these are called peritubular capillaries and they allow for selective reabsorption of substances as well as secretion.
Oxygen exchange takes place in the capillaries, which are the smallest blood vessels in the body.
Active transport of substances from the blood into the nephron is called tubular secretion. This process involves the movement of certain substances, such as drugs and ions, from the blood into the renal tubules for excretion in the urine. It helps in regulating the composition of body fluids and maintaining homeostasis.
Nephrons are NOT blood vessels in the kidneys. The nephron is a three-stage unit, located in the kidney, responsible for filtering and absorbing substances. There are about one million of these structures per kidney. # The filter unit is the primary part. Small molecules diffuse into the nephron from the capillaries. # The second stage is the reabsorption region. This is where certain molecules are actively transferred back into the blood. # Finally, the collecting duct transports the waste products to the bladder as urine.
Selective reabsorption
in the ascending limb of the loop of Henle
Tubular secretion