Final answer:
Three similarities between the bulk flow of air in the respiratory system and the bulk flow of blood in the cardiovascular system are: the use of a transport medium, the presence of a circulatory network, and the occurrence of exchange at tissues.
Step-by-step explanation:
Three similarities between bulk flow of air in the respiratory system and the bulk flow of blood through the cardiovascular system are:
- Transport Medium: Both systems use a fluid medium to transport substances. In the respiratory system, air is the medium that carries oxygen and removes carbon dioxide. In the cardiovascular system, blood is the medium that transports oxygen, nutrients, hormones, and waste products.
- Circulatory Network: Both systems have a network of vessels for the flow of the transport medium. In the respiratory system, the air flows through the nasal cavity, pharynx, trachea, bronchi, bronchioles, and alveoli. In the cardiovascular system, the blood flows through arteries, veins, and capillaries.
- Exchange at Tissues: Both systems facilitate exchange of substances at the tissues. In the respiratory system, oxygen diffuses into the blood while carbon dioxide diffuses out of the blood in the alveoli. In the cardiovascular system, oxygen and nutrients are delivered to the tissues, while waste products like carbon dioxide are removed from the tissues.