The hairline refers to the border or line where the hair on the forehead begins to grow. It varies greatly from person to person and can be influenced by various factors...
Hair follicles are tiny, pocket-shaped structures in the skin from which hair grows. Each follicle houses the root of the hair, consisting of protein cells. With the help of nutrients from the bloodstream produce...
The hair cortex, or cortex, is the main part of the hair shaft and lies between the outer layer, the cuticle, and the inner core, the medulla (if present). The cortex makes the largest…
The hair cortex, also called the cortex, is the main part of the hair shaft and lies between the outer layer (cuticle) and the inner core (medulla, if present). The bark makes up the majority…
The hair shaft is the visible part of the hair that protrudes from the skin. It consists of dead tissue formed from keratinized cells that have no living cells or blood vessels…
A hair transplant is a surgical procedure in which hair follicles are transplanted from a part of the body, known as the “donor area,” to bald or balding areas of the head, known as the “recipient area.”…
Hair types are often classified based on the texture and shape of the hair. The most widely used classification was developed by hairdresser Andre Walker and includes four main types: Type…
The hair root is the part of the hair that is located under the skin and embedded in the hair follicle. It is responsible for the growth of hair and consists of…
The hair bulb, also known as the hair bulb, is the lower part of the hair root, located in the deepest region of the hair follicle. It has an onion-shaped structure and surrounds the hair papilla,…
Witch hair, also known as terminal hair or simply strong, thick hair, refers to the longest, thickest, and darkest hair on the body. The term is sometimes used colloquially to mean unusual...
Hirsutism is a condition characterized by excessive growth of dark, coarse hair in women in a male pattern. This can include the growth of facial hair (chin and upper lip),…
Hormones are chemical messengers that are produced by the endocrine glands in the body and released into the bloodstream. They travel throughout the body and act on specific target cells or organs,…
In the context of hair removal, the abbreviation “HR” typically stands for “Hair Removal”. A specific “HR method” can refer to various technologies and procedures used to remove unwanted body hair…
Hypertrichosis is a rare condition characterized by excessive hair growth in areas of the body where little to no hair normally grows. This excessive hair growth can either be congenital (from birth...
Hypotrichosis refers to a condition in which there is abnormally sparse hair growth. In contrast to alopecia, in which hair that previously grew normally falls out, hypotrichosis is caused by…
Frizzy hair, often described as Type 4 in the hair type classification, is characterized by a very tight and defined curl that ranges from fine and thin to thick and coarse…
Lanugo hair refers to the fine, soft and usually colorless hairs that cover the body of a fetus in the womb. This type of hair begins to develop around the fourth month of pregnancy and…
The medulla is the innermost part of the hair shaft and is different in different hair types. It consists of a soft, loose arrangement of cells and air chambers that give the hair additional…
The arrector pili muscle (plural: Musculi arrectores pilorum) is a small, smooth muscle that is connected to every hair follicle in the human body. The main function of this muscle is to…
The papilla is a term used in various contexts of biology and medicine to describe a small, cone- or wart-shaped structure. In the context of hair biology...
