B3.1.2 movement of molecules-Gaseous exchange

HideShow resource information

a) The lungs are in the thorax, protected by the ribcage and separated from the abdomen by the diaphragm.

b) The breathing system takes air in and out of the body so that oxygen can diffuse into the bloodstream and carbon dioxide can diffuse out of the bloodstream and into the air.

c) To force air out of the lungs, intercostal muscles relax causing the thorax to decrease and the diaphragm relax increasing the pressure and forcing the…


No comments have yet been made

Similar Biology resources:

See all Biology resources »See all Exchange of materials resources »