All organisms have a barrier that separates their internal environment from the outside world. Which of the fo

Question

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. 
excretory system
 C. 
circulatory system
 D. 
nervous system

GPT-5 mini · Answer

A. integumentary system

The integumentary system (skin, hair, nails) serves as the primary physical and chemical barrier between the internal body and the external environment, protecting against pathogens, dehydration, and physical injury.

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.
excretory system
C.
circulatory system
D.
nervous system

All Answers 1

Submit Your Answer

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. excretory system C. circulatory system D. nervous system

All Answers 1

Submit Your Answer

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.
excretory system
C.
circulatory system
D.
nervous system