Tuesday, 14 February 2017

The structure and composition of eyebrows - Explaining those on fleek hairs above the eyes

First and foremost, they protect your eyes. The shape of the brow ridge and the brows themselves channel sweat, rain, and moisture away from the eyeballs so your vision stays clear. Second, they're essential for nonverbal communication. Eyebrows help keep moisture out of our eyes when we sweat or walk around in the rain. The arch shape diverts the rain or sweat around to the sides of our face, keeping our eyes relatively dry.As a species we humans rely on our sight more than any other sense, and water can seriously blur vision. Eyebrows may also deflect debris and shield our eyes from the Sun. So while we slowly evolved to lose most of our body hair, our eyelashes and eyebrows remained. An estimated 90% of your hair follicles are typically in the growth phase at any given point. The hair in your eyebrows just experience a shorter cycle length, about 4 months (compared to 3 years for the hair on your head). The length of your hair is basically capped by the time which it has to grow. For a healthy young adult, the average time for tweezed hair to grow back at full hair length is 56 days.

Information and statistics from:

Saturday, 4 February 2017


Eyelashes protect the eye from debris and perform some of the same function as whiskers do on a cat or a mouse in the sense that they are sensitive to being touched, thus providing a warning that an object (such as an insect) is near the eye (which then closes reflexively).Like all the hair in the human body, eyelashes are a biological polymer, made up of about 10 per cent of water and 90 per cent of proteins, such as keratins, and melanins, the substances that give hair its color. And, as all the human hair, they are fed by follicles, located below the skin. There are many particles in the air, like dust and sand, which can get into your eyes and harm them. Your eyelashes help to tell your eyelids when they need to shut to protect the eyes. Along with your eyebrows and forehead, your eyelashes also help to shield your eyes from the bright light of the sun. The anagen phase is also called the growth phase. This is the phase when lashes are actively growing, and it lasts between 30 and 45 days. Only about 40 percent of the upper lashes and 15 percent of the lower lashes are in the anagen phase at any one time. Each lash will grow to a specific length and then stop.

Information from:
Image from: http://cdn2.blisstree.com/wp-content/uploads/2013/05/shutterstock_50402491.jpg


I have really enjoyed doing anatomy and physiology in the form of blogs, I feel it has given me something to do peacefully at home following...