-ALVEOLI-
Transfer oxygen to the blood and remove carbon dioxide in the lungs
made up of air sacs
ADAPTATIONS OF THE ALVEOLI
1.enormous surface area
2. Moist lining to dissolve gases
3. Very thin walls
4. Good blood supply

-THE BLOOD-
RED BLOOD CELLS
-carry oxygen from the lungs to all cells in the body
-large surface area
-don't have a nucleus so they can carry more oxygen
-they contain a pigment cashed haemoglobin that's combines with oxygen
WHITE BLOOD CELLS
-they change shape to engulf unwelcome microorganisms
-they produce anti bodies and anti toxins
-they have a nucleus
PLATELETS
-help blood to clot at a wound to stop blood pouring out
PLASMA
-transports everything in the blood

-OSMOSIS-
The movement of water molecules across a partially permeable membrane from a region of high concentration to low concentration.
-can move both ways
-sucrose and water solutions
-a type of diffusion