The answer is A because the heart pumps blood from the heart through pulmonary artery that is low in oxygen and high in carbon dioxide concentration, to the lungs.
Answer:
The period focused on self-actualization and one's ability to accept what is going on in one's life. The earliest Renaissance literature appeared in Italy in the 14th century; Petrarch, Machiavelli, and Ariosto are notable examples of Italian Renaissance writers.
Explanation:
microbes made beverage and food go bad
The left ventricle must contract with more force in order to send blood to the body's extremities
I hope this helps! I'm happy to answer any other questions you might have :)