During a swallow, the __________ has to keep food out of the airways.

________ form a temporary plug to stop bleeding in a broken blood vessel.

Chyme contains which of the following?

The T wave of an ECG is produced by the ______.

Which of the following would be least helpful if you needed to quickly escape from an angry alligator?

Each lung has only one ______.

The pulmonary arteries carry _________ blood to the _________.

In a blood transfusion, one must consider the ________ of the donor and the _______ of the recipient.

The pulmonary veins carry _________ blood to the _________.

________ and respiratory movements move lymph upward through lymphatic vessels and trunks below the heart.