What is the difference between Ventilation and Respiration? â¢ Ventilation facilitates the process of respiration. Without ventilation, respiration cannot occur. â¢ The ventilation is the movement of air into and out of the lungs whereas the respiration is the exchange of oxygen and carbon dioxide.
Webster Dictionary(0.00 / 0 votes)Rate this definition: 1  Polypoid(adj) like a polyp; having the nature of a polyp, but lacking the tentacles or other parts. 2  Polypoid(adj) resembling a polypus in appearance; having a character like that of a polypus.
The hippopotamus (Hippopotamus amphibius), or hippo, ancient Greek for river horse (Î¹ÏÏÎ¿ÏÏÏÎ±Î¼Î¿Ï), is a large mammal in Africa that usually eats plants. It is one of only two species in the family Hippopotamidae that are still alive. The other is the Pygmy Hippopotamus.