The respiratory system removes carbon dioxide from the blood and brings oxygen into the blood. This process occurs through the lungs, where oxygen from the air is exchanged for carbon dioxide in the blood.
When you inhale, your breath is drawn into your lungs, and is exchanged for Carbon Dioxide. The oxygen is 'traded' for Carbon Dioxide from your blood vessels, which leaves the body when you exhale. In other words, inhaling brings Oxygen to your blood.
The brain is the organ that uses about 20% of the oxygen in your blood.
the lung
heart
the lung
veins
because oxygen brings food to the cell
because oxygen brings food to the cell
The respiratory system brings oxygen to cells. Oxygen is inhaled through the lungs, where it diffuses into the bloodstream and is transported by red blood cells to cells throughout the body. There, it is used in cellular respiration to produce energy.
Blood brings food and oxygen to your cells.
The cornea in the eye does not receive oxygen from blood. Instead, it gets its oxygen directly from the air.