1. The human being has an average of 100,000 scalp hairs.
2. A giraffe’s tongue is about 18 to 20 inches long and has a blue-black color to help prevent sunburn.34 more words
Exposing our skin to sunlight is very important in synthesis of vitamin D but at the same time excessive exposure is unhealthy. Since the skin is the largest organ of the body, measures should be taken to prevent it against damages from the sun. 273 more words