How Kidneys remove urea?

Question 1

What is urea?

Answer 1

Blood contains urea- waste product formed the breakdown of excess protein in the body
- Urea is toxic to the body if it builds up- blood wants to excrete it

Question 2

What excreted urea?

Answer 2

• Kidneys filter out urea along with excess water and ions

- Excrete from the body into urine

Question 3

How is urea excreted?

Answer 3

• Blood flows into kidney in the renal artery and splits into smaller arteries- become capillaries
• Each capillary has a glomerulus
• High blood pressure allows the glomerulus to squeeze out the blood
• Blood does not want urea- carries it moving through nephron into the collecting duct
• Urea is stored until it is time to be excreted

Question 4

What is ultra filtration

Answer 4

• Blood cells and protein are too large to be filtered out so they stay in capillaries

Question 5

What is filtrate?

Answer 5

• Water, glucose, amino acids, ions and urea all get filtered out and recollected by the Bowman’s capsule (beginning of nephron)

Question 6

What is selective reabsorption?

Answer 6

-As the filtrate passes along anything that the body needs in reabsorbed.

Question 7

What is the collecting duct?

Answer 7

• Takes waste down the pyramid in the kidney and collects all the waste from all the nephrons
• Follows out of the kidney into the ureter down the bladder