By passive diffusion down its concentration gradient, which requires no energy expenditure from the cell. Basically, if you have more oxygen outside a cell than inside a cell, it travels through channels or holes in the cell membrane until the concentration of oxygen is equal inside and outside the cell.
CO2 and O2 go inside and outside the cell due to a process called diffusion. Diffusion is the process of movement of a substance from area of high concentration to the area where its concentration is higher.
Simple diffusion. Oxygen and carbon dioxide can both go directly through the lipid bilayer.
Picks up the oxygen, and takes it to all the living cells of our bodies.
Oxygen and carbon dioxide enter and leave the cell by diffusion.
stomata
Two substances that pass into the blood include oxygen and carbon dioxide. The blood carries fresh oxygen to the cells and tissues and removes waste materials.
They are called guard cells. They control how much carbon dioxide and water is entering the plant.
stoma (also stomate; plural stomata) is a tiny opening or pore, found mostly on the underside of a plant leaf and used for gas exchange. Air containing carbon dioxide enters the plant through these openings where it is used in photosynthesis and respiration. Oxygen produced by photosynthesis in the spongy layer cells (parenchyma cells with pectin) of the leaf interior exits through these same openings. Also, water vapor is released into the atmosphere through these pores in a process called transpiration.
The leaf first takes in Carbon Dioxide, or CO2, into it's self through the bottom of the leaf. It uses the CO2 and makes sugars out of it, water, and sunlight. This reaction makes a byproduct, Oxygen, that the leaf lets out, which we use to breathe.
Carbon dioxide and oxygen enter and leave the plant through the stomata, on the underside of leaves.
guard cells and stomata.
Oxygen must enter our blood and Carbon Dioxide must leave the blood through our lungs. They do so by diffusion between the cappillaries.
There are a number of gases that enter and leave the lungs - predominantly, humans Inspire (Breathe in) Oxygen and Expire (Breathe out) Carbon Dioxide. soo that is the answer init lool x
Oxygen (O2) and Carbon Dioxide (CO2) =)
Diffusion
Oxygen must enter our blood and Carbon Dioxide must leave the blood through our lungs. They do so by diffusion between the cappillaries.
Oxygen is brought into the blood, and carbon dioxide released from the blood, at the alveoli of the lungs. Gases diffuse across the alveolar membrane to enter or leave the blood.
plants take in carbon dioxide and release oxygen
Oxygen and carbon dioxide get into and out of cells via diffusion. The gases diffuse across the thin capillary wall, and then diffuse across the cell membrane.
stomata
Guard cells allows the exchange of oxygen and carbon dioxide in and out of the leaf. This is known as leaf exchange. When guard cells are full of water they swell up and close meaning no oxygen can leave or carbon dioxide can enter, but when the water is taken away from the cell they open up to allow oxygen to exit and carbon dioxide to enter.