Question

the ______ system is made up of the bodys outermost skin layers and acts as a physical barrier that makes it difficult for pathogens to enter the body. cardiovascular digestive integumentary respiratory

Explanation:

The integumentary system consists of skin, hair, nails and associated glands. It forms a physical barrier to prevent pathogen entry. The cardiovascular system deals with blood - circulation, the digestive system with food breakdown, and the respiratory system with gas - exchange.

Answer:

C. integumentary