Question

what does the trachea do? select all that apply. it is a tube that allows air to pass into and then out of the body. it pumps oxygen - poor blood to the lungs and oxygen - rich blood to other body organs. it breaks down toxins in the blood. it provides a barrier against contaminants found in the environment. it produces insulin, a hormone that helps regulate the bodys glucose level.

Explanation:

The trachea is a tube in the respiratory system. Its main function is to allow air to pass into and out of the body and also provides a barrier against environmental contaminants. Pumping blood is the heart's function, breaking down toxins is mainly the liver's role, and insulin production is by the pancreas.

Answer:

It is a tube that allows air to pass into and then out of the body.
It provides a barrier against contaminants found in the environment.