The primary function of our heart is pumping the blood throughout our body. The circulatory system plays a crucial role in providing the body with the oxygen needed by cells. Oxygen gets from the lungs to the body's cells by attaching to hemoglobin in the red blood cells, which are carried around the body in blood vessels along with blood. Oxygen diffuses across capillary cell membranes into cells, where it is taken into the mitochondria and used as a hydrogen acceptor during the production of ATP to produce water.
the heart is an organ that pumps blood throughout the body of the circulatory system, supplying oxygen and nutrients to the tissues and removing carbon dioxide and other wastes
changes in the enzyme's shape would decrease its ability to function as this would change the active site of the enzyme, meaning it is harder for it to carry out its job.
this is why we try to keep enzymes in their optimum environmental conditions so they can function their best
