Answer:
Explanation:
To become infected with HIV , infected blood, semen or vaginal secretions must enter your body. this can happen by have yk...
I believe it’s your head since it has more friction
Answer:
Cell membranes are semi-permeable, which works like a sieve that determines what enters and leaves the cells.
Explanation:
It is semi-permeable and it allows molecules to diffuse inside.
<em>Feel free to mark it as brainliest :P</em>
