Question

1. in school olivia learned that some immune cells are made in the marrow of bones. she shared with her parents that she was surprised to learn about two new system interactions. what two systems were interacting in olivias science lesson?

a. the immune system and the skeletal system.
b. the immune system and the muscular system.
c. the circulatory system and the skeletal system.
d. the muscular system and the circulatory system.

Explanation:

The skeletal system's bone marrow produces immune cells. The immune system uses these cells to function. So the immune and skeletal systems interact here.

Answer:

A. The Immune System and the Skeletal System