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, or hippo, ancient Greek for river horse, 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. The hippopotamus is the second largest land animal in size, and the third largest land animal in weight. The elephant is the heaviest, and the white rhinoceros is the second heaviest, but a bit smaller than the hippo. The hippo is also the heaviest artiodactyl. The h