Contest Days 22 and 23

For anyone who noticed I didn't make yesterdays psot so today there will be two sets of hints.

Day 22

1.) I'm covered in dense growth.
2.) I'm hot, moist, and dark inside.
3.) It's danerous to be inside me without protection.

Day 23

1.) Using my throat is my business.
2.)I know how to use my diaphragm.
3.)I preform orally.

What are we?