How is oxygen absorbed into the blood stream?

Answer 1

Respiration.

Answer 2

In the body, this is done using the red blood cells or haemoglobin. These cells contain iron (which is why it's so important in your diet) and the oxygen molecules stick to this. This also gives your blood it's red colour, like rust on metal. Red cells are also concave, like plates. This helps them hold on to the oxygen too. These red cells pass through the tiny blood vessels in your lungs where the gas exchange takes place in the alveoli (like little bits of broccoli) over a large surface area. Carbon dioxide is expelled, and oxygen bonds to the iron in the red cells. The oxygenated blood then travels around the body to the cells, where it passes into individual cells using a process called osmosis.

Answer 3

By the alveoles in the lungs (by diffusion).

Answer 4

You get oxygen into your blood by breathing oxygen and then it gets into the lungs. From there it enters the alveolar capillaries in the lungs and attaches to the red blood cells.

Answer 5

Oxygen is absorbed by the alveoli of the lungs and carried by the blood to each cell.

Answer 6

In the lungs

Answer 7

lung