gas exchange and breathing Flashcards
what are unicellular organisms
they can rely on diffusion because they have a relatively large surface area compared to their volume
what are multicellular organisms
they need transportr systems in order to transport essentials like oxygen and glucose to every cell
what do multicellular organisms have
they have a small surface are to volume ratio and so diffusion would be slow to provide the necessary oxygen and glucose to every cell
what is ventilation
ventilation or breathing is the process by which air is constantly moved into and out of the lungs
what is inspiration or inhalation
is when air is forced into the alveoli because the pressure of the atmosphere is greater than the pressure inside the lungs