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.
Hedgehogs possess a specialized coat of approximately 5,000-7,000 spines. Each spine, or modified hair, grows from a follicle in the skin. Each follicle is attached to a small muscle (arrector pili) that is used for piloerection when the hedgehog is threatened.The spines are hollow and sharp, but not barbed.edgehogs possess a specialized coat of approximately 5,000-7,000 spines. Each spine, or modified hair, grows from a follicle in the skin. Each follicle is attached to a small muscle (arrector pili) that is used for piloerection when the hedgehog is threatened. The spines are hollow and sharp, but not barbed.