HELP ASAP Identify the body's "barrier" or "first lines of defense" that keep microorganisms from infecting the body.

Group of answer choices

Skin

Shoes

Saliva

Tears

Mucous membrane

Stomach acid

Teeth

Fingernails

What are hormones? a. they are minerals needed for proper bone formation. b. they are the parts of the body targeted by endocrine glands. c. they are substances needed for muscle and nerve activity. d. they are substances released by endocrine glands.

Viruses can cause the following, check all that apply. a. sore throat b. measles c. ear infection d. flu e. chicken pox

The presence of aids in a community often increases its level of property what is one of the main reasons for this