5.2 excretion

Question 1

Excretion

Answer 1

Removal of metabolic waste from the body

Question 2

What is metabolic waste?

Answer 2

A substance that is produced in excess by the metabolic processes in the cells

Question 3

What are the excretory organs?

Answer 3

lungs – carbon dioxide.
Liver – urea.
Kidneys.
Skin – sweat 

Question 4

Why is it important?

Answer 4

Metabolic products can be toxic, so it can interfere with cell processes

Question 5

What are liver cells called?

Answer 5

Hepato-sites

Question 6

Hepatic artery

Answer 6

 oxygenated blood from the heart travels from the aorta via the hepatic artery into the liver

Question 7

Hepatic portal vein

Answer 7

Deoxygenated blood from the digestive system enters the liver from the hepatic portal vein

Question 8

Hepatic vein

Answer 8

Blood leaves the liver fired, I hepatic vein

Question 9

Bile duct

Answer 9

Carries bile from the liver to the gallbladder, where is stored until needed to aid the digestion of fats in the small intestine

Question 10

function of liver

Answer 10

Excess amino acids are broken down

Question 11

kupfer cells

Answer 11

break down worn out rbc wbc bacteria which come from hepatic portal vein

breakdown hb to make billirubin which is excreted in bile and faeces (brown pigment)