Topic 8 Exchange Surfaces, Circulation And Respiration Flashcards
How does oxygen get around the body?
Alveoli in the lungs= site of exchange
Reason for exchange= needed for respiration
How does carbon dioxide get around the body?
Alveoli in the lungs= site of exchange
Reason for exchange= waste product for metabolism
How does water get around the body?
Nephrons in the kidney= site of exchange
Reason for exchange= needed for cells to function properly
How does dissolved food molecules get around the body?
Small intestine= site of exchange
Reason for exchange= needed for respiration
How do mineral ions get around the body?
Small intestine=site of exchange
Reason for exchange= needed for cells to function properly
How does urea get around the body?
Nephrons in kidney= site for exchange
Reason for exchange= waste product of metabolism
How have alveoli adapted?
They have a large surface area
They are also moist
Good blood supply
What is the function of a red blood cell?
Carry oxygen around the body
What is the function of a white blood cell?
Fights diseases
What is the function of a platelet?
Help to clot blood
What is the function of the plasma?
Transport substances around the body
What is the structure of the veins?
The width of the vein allows blood to flow more easily along the vessel
What is the structure of the arteries?
It has thick elastic walls to stretch as blood arrives from the heart
What is the structure of the capillaries?
There one cell thick so substances like blood are close to the cell
What happens during aerobic respiration?
Uses oxygen
Produces CO2 and water
Large amount of energy needed
