Q: Bone marrow, the thymus gland, the spleen, and the tonsils are organs in what body system?


Read this paragraph and choose the correct option from the provided answers:

Immune system organs include bone marrow, the thymus gland, the spleen, and the tonsils. Each organ has a different job in the immune system.

 Choices:

- skeletal system

- nervous system

- reproductive system

- immune system


A:
immune system