Answer:
Lungs supply oxygen carried by blood to cells of the body. The cells which are responsible for the transportation of oxygen is hemoglobin. When oxygen rich hemoglobin reaches a cell so the oxygen is unloaded and carbondioxide which is produced as a waste product is loaded in hemoglobin. Again this hemoglobin goes to the lungs and dispose carbondioxide there and repeat the process again.
Answer:
A I think sorry if its wrong
Biology is the study of living thing
Answer:
charts that show population increase or decrease.
like
the internet is also one like the san diego zoo has a page where you can see if the animal is flourishing in numbers, or not.
Bacteria, since most gas is due to the breakdown of fats or carbohydrates by intestinal flora (normally dwelling bacterial cultures)
