Predict what might happen to a population that is experiencing little immigration and emigration, low birth rate, and high death rate.

What are some possible short and long term medical concerns for crew members on longer space exploration trips

Acell in the human nervous system whose primary function is to form myelin and the blood-brain barrier, respond to injury, remove debris, and enhance learning and memory is called a(n) cell.

In what part of the body does the most muscle activity happen?