The brain is already getting more than enough blood to it, so it wouldn't function at a higher level, theorizes Dr. Martin. Interestingly, when we are in the embryonic stage of development, we actually do have two hearts. The heart primordia (which describes the stage of the heart's ...
Identify the normal structure and function of the respiratory system. Explain how the structure of each tissue is linked to its function in the human body. Explain the major types of tissues and their functions. The heart is at rest more than it is at work. Explain how this can be. Defin...
What are the structures of the arteries, veins and capillaries in relation to their functions? What is the purpose of the diaphragm? How do mesodermal cells invaginate in amphibians? What is the main function of the medulla? Identify the main organs in the digestive, circulatory, breathing, ...