Lose weight: Creating a calorie deficit that results in weight loss is hard work. Most recommendations say that to lose weight, you must exercise for at least an hour a day, five times a week. The type of exercise matters, too.
Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia. hair shaft. the nongrowing portion of a hair that protrudes from the skin, that is, from the follicle. hair shaft. The keratinized portion of a hair that extends from a hair follicle beyond the surface of the epidermis.
This layer is at the very surface, and is the most visible portion of a shaft to the naked eye. The second layer of the human hair shaft is the cortex. If we are to use a tree as illustration, then the cuticular scales are the bark of a tree, and the cortex is the actual trunk of the tree. The trunk is protected by the bark, the same way the cuticular scales protect the cortex of the hair shaft. The final layer of the shaft is the medullas.