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The esophagus passes through an opening in the diaphragm called the esophageal hiatus.

The mechanism that ensures that the volume of blood discharged from the heart is equal to the volume entering its chambers is described by __________ law of the heart.

Drugs used to reduce the tissue rejection reaction following the transplantation of tissue from one person to another

A vaccine can halt an infection in a population if everyone is vaccinated due to

Injections of gamma globulin are sometimes given to provide

The right atrium receives blood directly from

The SA node relays nerve impulses into the AV bundle of the interventricular septum, and the AV node is responsible for the rhythmic contractions of the heart.

Which of the following is true in regard to bile?

The pulmonary trunk divides into the right and left pulmonary arteries about __________ centimeters above its origin.

The foreign, or “non-self” substances that trigger immune responses are called ______.