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The inner root sheath or internal root sheath of the hair follicle is located between the outer root sheath and the hair shaft. [1] It is made of three layers: Henle's layer, Huxley's layer, and the cuticle. [2] The inner root sheaf serves to protect growing hair. [3]
Layered hair: A women's hairstyle where different sections of the hair are cut at different lengths to give the impression of layers. Liberty spikes: Hair that is grown out long and spiked up usually with a gel Lob: A shoulder-length hairstyle for women, much like a long bob, hence the name. Mullet: Hair that is short in front and long in the back.
Hair exists in a variety of textures. Three main aspects of hair texture are the curl pattern, volume, and consistency. All mammalian hair is composed of keratin, so the make-up of hair follicles is not the source of varying hair patterns. There are a range of theories pertaining to the curl patterns of hair.
Micrograph of a teratoma showing tissue from all three germ layers: mesoderm (immature cartilage - left-upper), endoderm (gastrointestinal glands - center-bottom) and ectoderm (epidermis - right) Teratomas are thought to originate in utero, so can be considered congenital tumors. Many teratomas are not diagnosed until much later in childhood or ...
Anatomy of hair Diagram of the hair shaft, indicating medulla (innermost), cortex, and cuticle (exterior.) The medulla is the innermost layer of the hair shaft. This nearly invisible layer is the most soft and fragile, and serves as the pith or marrow of the hair. Some mammals don't have a medulla in their hair. The presence or absence of this ...
A dense subcutaneous layer of fat and fibrous tissue that lies beneath the skin, containing the nerves and vessels of the scalp. A: Aponeurosis. The epicranial aponeurosis or galea aponeurotica is a tough layer of dense fibrous tissue which anchors the above layers in place. It runs from the frontalis muscle anteriorly to the occipitalis ...
Layered hair is a hairstyle that gives the illusion of length and volume at the same time, using long hair (in the back) for the illusion of length, and short hair (in the front) for volume, as an easy style to manage. Hair is arranged into layers, with the top layers (those that grow nearer the crown) cut shorter than the layers beneath.
The modern mammalian fur arrangement is known to have occurred as far back as docodonts, haramiyidans and eutriconodonts, with specimens of Castorocauda, Megaconus and Spinolestes preserving compound follicles with both guard hair and underfur. Fur may consist of three layers, each with a different type of hair.