A physician tells a client that her body is not making enough blood cells. After the physician leaves, the client appears very upset and states, ‘‘I do not even know how my body is supposed to make...

A physician tells a client that her body is not making enough blood cells. After the physician leaves, the client appears very upset and states, ‘‘I do not even know how my body is supposed to make blood cells.’’ What is the simplest, yet correct, instruction for the nurse to give the client at this time?

1. Complex mechanisms within the body make blood cells.

2. The bone marrow produces blood cells.

3. Blood cells originate from a healthy immune system.

4. The lymphatic system produces blood cells.