Blood flow goes from the heart, to the lungs, and back to the heart again.
If the tank is a small one and filled with freshwater, an activity performed by a student that is investigating an abiotic factor using the setup would be to record the temperature of the water.
Growth hormone deficiency is associated with the pituitary <span>and hypothalamus glands. So, it must be that these are the glands that are involved in dwarfism. But, most likely it is the pituitary gland. Hope this answers the question. Have a nice day. </span>