Which of the following organs forms a barrier between an animal and its external environment? By: Sunday|Published on: Jan 20|Categories: Agricultural Science WAEC| 0 comments A. Urinary bladder B. Stomach C. Lung D. Skin Correct Answer: Option B B. Stomach Users Also Read These:Which of the following is not a barrier to the…Which of the following will NOT be a barrier to…When an animal is being fed on a ration that does…The exchange of gases between the environment and…One of the reasons why the government may erect a…SEE ALSO The deficiency of nitrogen in a maize plant can be corrected by applying?