This summary provides the key details from the passage in 3 sentences:
The passage discusses the functions and features of human skin, noting that it is the largest organ and lets us feel touch while also maintaining temperature and protecting us from the sun. It explains that some parts of the body are more sensitive to touch than others, like fingertips and lips. The passage also describes how skin helps regulate body temperature by causing hairs to stand up when cold to hold a layer of air next to the body to keep warm.