Ultrafiltration - Excretion

parts of the nephron

• glomerulus

• bowman’s capsule

• proximal convoluted tubule

• loop of henle

• distal convoluted tubule

• collecting duct

ultrafiltration - process

1. blood comes along a capillary under high pressure

2. the capillary forms a bundle called the glomerulus

3. all the small items of the blood are then forced out in the beginning of the nephron called the bowman’s capsule

4. this pressure leads to ultrafiltration

5. blood leaves the glomerulus and the capillary continues around the nephron

6. the capillaries join up with others to form the renal vein

7. the useful products must move out of the nephron back into the blood

small items - components

• glucose

• amino acids

• water

• fats

• ions

• urea

big items - components

• blood cells

• large proteins

components of glomerular filtrate

• urea

• water

• salts

• glucose