D. A condition that causes narrowing of the coronary arteries so blood flow to the heart muscle is reduced carotid arteries
True, there are many vessels serving as a conduit<span> between the lungs and the heart.
The number of the vessel is many because all the carbon dioxide from body need to be released at the lungs. More vessel means more surface area and blood flow rate to do the diffusion of the gas which means increased diffusion rate. This will allow the lung to transfer oxygen and dump carbon dioxide faster.</span>
Answer:
C!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
A) producing a litter of puppies by mating two dogs of different breeds
Explanation:
The answer is basically D