How do cells get oxygen and get rid of co2?

Question

How do cells get oxygen and get rid of co2?

Answer 1

This is a concept answer and I've learnt this 10+ years ago. I hope I got it right:

My Answer:

With convection through the lung - density of both gases' difference (between cell & atmosphere) causing convection at alveoli.

Answer 2

Diffusion. If there is a membrane (in this case the cell membrane) and a higher concentration of a molecule on one side, it will diffuse through the membrane until the concentrations are equal. With cells, blood flows by the cell, carrying high amounts of oxygen and low amounts of co2. The oxygen flows into the cell, and the co2 flows out of it

Answer 3

I assume you are talking about animal cells.

Firstly, when carbon dioxide builds up in cells of the body it diffuses out into the the blood stream.The blood then proceeds heart which pumps  it to the lungs to be oxygenated.At the lungs there a several branches know as bronchioles that lead to sac-like alveoli.Air is constantly brought into the body via inspiration and flows to the lungs and alveoli.This air contains the needed oxygen.Capillaries (which are one cell thick) surround the alveoli,whose walls are also one cell thick.Being one cell thick facilitates diffusion.Since the concentration of carbon dioxide is higher in these  capillaries carbon dioxide diffuses out and enters the alveoli where it is in lower concentration.Additionally oxygen diffuses out of the alveoli, where it is higly concentrated,and enters the capillaries where its concentration is less.The capillaries, which now contain oxygenated blood, leave the lungs and flow near to all body cells and tissues which can take up its oxygen via diffusion,as well as release its carbon dioxide into the bloodstrem so that the process is repeated.

Good Luck.Sorry about the long winded answer,it helps with understanding!

Answer 4

Since this is in the botany section I assume your asking about plant cells. Plants exchange gases (O2 and CO2) through pores on the leaves called stomates. Plants that don't have stomates, such as mosses, exchange gases by diffusion.