Question

yo pls help All organisms have a barrier that separates their internal environment from the outside world. Which of the following organ systems forms a barrier between the internal and external environments for humans? A. integumentary system B. circulatory system C. nervous system D. excretory system

Answer 1

c

Step-by-step explanation:

Answer 2

That would be the Integumentary system.

Step-by-step explanation:

The integumentary system is the system of the body that produces hair, skin, etc.