Which of the following organs forms a barrier between an animal and its external environment? by Sunday | Jan 20 | Agricultural Science WAEC | 0 comments A. Urinary bladder B. Stomach C. Lung D. Skin Correct Answer: Option B B. Stomach Users Also Read These:When an animal is being fed on a ration that does…The barrier between maternal and foetal blood is the?Which of the following is not a barrier to the…Which of the following will NOT be a barrier to…Which of the following is a major barrier to…