Your bloodstream can't store oxygen for an extended period; it just transports it from the lungs to where it is needed.
False. Lungs do not store oxygen. Oxygen is continuously delivered to the bloodstream and circulation by the lungs, where it is then transported to cells throughout the body.
In your blood. The protein hemoglobin carries oxygen-molecules between the lungs and the peripheral tissues and organs.
Oxygen is the gas that passes from the lungs to the bloodstream.
In the bloodstream
oxyhemoglobin
The lungs diffuse oxygen into the bloodstream. Oxygen from the air we breathe is absorbed into the bloodstream through the walls of the alveoli in the lungs, where it is then carried by red blood cells to be delivered to the body's tissues.
To deliver oxygen to the bloodstream and to remove carbon dioxide from the bloodstream.
Oxygen
No, the movement of oxygen from the lungs to the bloodstream is not by osmosis. Instead, it occurs through a process called diffusion, where oxygen molecules move from an area of high concentration (in the lungs) to an area of lower concentration (in the bloodstream) to reach equilibrium.
I wouldn't exactly characterize it as separating carbon dioxide and oxygen, however, I think the answer you are looking for is the lungs which takes up oxygen into the bloodstream and expels carbon dioxide out of the bloodstream into the lungs so we can breathe it out again.
Carbon monoxide is a gas that can block oxygen from getting into your bloodstream. When inhaled, it binds to hemoglobin in the red blood cells more readily than oxygen, reducing the amount of oxygen that can be transported in the blood.
The small sac-like structures in the lungs are called alveoli. This is where the exchange of oxygen and carbon dioxide occurs with the bloodstream, a process known as gas exchange. Oxygen diffuses from the alveoli into the bloodstream, while carbon dioxide moves from the bloodstream into the alveoli to be exhaled.