Truly modern molecular biology emerged with the uncovering of the structure of DNA in the 1960s and concurrent advances in biochemistry and genetics. Molecular biology is one of three primary molecular-scale biological sciences, the others being biochemistry and genetics.
1 Students should know the parts and functions of the circulatory and respiratory systems and how they work together for respiration. 2  Students should also understand what homeostasis is and that all living things must be able to maintain homeostasis.
The lung is soft and protected by the ribcage. The purposes of the lungs are to bring oxygen (abbreviated O 2), into the body and to remove carbon dioxide (abbreviated CO 2). Oxygen is a gas that provides us energy while carbon dioxide is a waste product or exhaust of the body.o deliver oxygen to the body, air is breathed in through the nose, mouth or both. The nose is the preferred route since it is a better filter than the mouth. The nose decreases the amount of irritants delivered to the lung, whilst also heating and adding moisture (humidity) into the air we breathe.