Question

question 8 of 16question 1-8both of these organ systems help to protect the body from infection by blocking external pathogens and regulating body temperature○ immune and digestive○ integumentary and reproductive○ integumentary and circulatory● digestive and lymphatic

Explanation:

The integumentary system (skin, hair, nails) acts as a physical barrier to block external pathogens, and also regulates body temperature via sweating, vasodilation/vasoconstriction. The circulatory system (blood vessels, heart) helps distribute immune cells to fight infections, and also aids in temperature regulation by moving warm/cool blood around the body. Other options do not match both functions: immune system fights but does not block pathogens physically; digestive, lymphatic, reproductive systems do not perform both listed roles.

Answer:

C. Integumentary and Circulatory