internal respiration
Exhalation
providing the body with oxygen and expelling carbon dioxide
carbon dioxide
Carbon dioxide is removed from the blood by the lungs and exhaled when you breath out.
The water that the fish swims in passes over the gills - these work like our own lungs - taking in oxygen, and expelling carbon dioxide. This is why you need to change the water in the tank on a regular basis - because the level of carbon dioxide increases daily.
carbon dioxide
In lungs alveoli is present where exchange of gases takes place, when blood with carbon dioxide is reached lungs then these alveoli purify by removing carbon dioxide
The carbon dioxide is exhaled.
Carbon dioxide is excreted from the lungs.
No. Your lungs pass oxygen into the blood and also pass carbon dioxide to the air outside your body. Oxygen combines with carbon to form carbon dioxide. This happens in our muscles, among other places.
what is the concentration of oxygemnin the lungs normally compared to carbon dioxide
Hemoglobin carries oxygen from the lungs to the body and carbon dioxide back from the body to the lungs.
Simply put, the lungs don't get oxygenated blood. The lungs produced oxygenated blood by collected de oxygenated blood and expelling the carbon dioxide (breath out) and refilling with oxygen (breath in). This is a very simple and basic explanation but suffice to say that all this is made possible through tiny blood vessells which can absorb fresh oxygen and expel carbon dioxide via the lungs.