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.
Air enters the body when you inhale (Breathe in) air enters through the mouth and into the lungs. and then exhale (Breathe out) carbon dioxide (CO2). 5 people found this useful.Edit. perfect Mix of oxygen and Carbon dioxide enter your body through your mouth and go through your breathing pipe to your lungs it then it goes past a paperthin skin which unox â¦ igenated Blood goes past and then your blood is oxigenated!.