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.
Skeletal Nervous System. They work together to provide the basic actions within complex organisms which allow life to occur. The respiratory takes in oxygen and removes waste from cellular respiration (CO2), which interacts with the rest of the body via the circulatory system (blood carries nutrients and wastes from one part of the body to another).