This video contains Hindi meaning of Pitch. .. #LOGICAL #STUDENT #HINDI #MEANING #Pitch
The hedgehog's back contains two large muscles that control the position of the quills. The average hedgehog has about 5,000 to 6,500 quills that are strong on the outer surface but filled with air pockets on the inside. When the creature is rolled into a ball, the quills on the back protect the tucked head, feet, and belly, which are not quilled.
The porcupine is very different from other rodents in North America because it is so large, has a big head and, of course, because of its long quills. Porcupines have around 30,000 quills, mostly on their backs and rumps. The longest quills are near the tail and the shortest are on their cheeks.