Correctly identify the name and function of the organs/glands/components that are numbered.  

________ is a characteristic of adaptive immunity but not innate immunity.

The pulmonary arteries are indicated by which number?    

Macrophages are ________.

The words “antigen” and “virus” are interchangeable?

The valves of the heart are part of which layer?

Match each term/event with the correct initiator.

Which of the following is a function of erythrocytes (red blood cells)?

   Which event of the cardiac cycle occurs when systolic blood pressure is measured?

A primary reason for needing a new vaccine for influenza each year is that _____.