Respuesta :

2. Hair, Nails, Skin.
3. Heat, and keeps bacteria and dirt out.
4. Sensory receptors.
5. Pores
6. Salt and heat.
7. melanin.
8. It blocks UV rays from getting to the DNA, which would damage the DNA and possibly cause skin cancer over long periods of time.
allyfontela
you can actually go on google and search up Directed Reading A: Integumentary system 

And the answers key will come up