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:The abolition of all forms of trade barriers among…Which of the following is a major barrier to…Explain the following business environments as they…The exchange of gases between the environment and…The temperature at which the saturated vapour…