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The scalp is the area of the head where head hair grows. [1] It is made up of skin, layers of connective and fibrous tissues, and the membrane of the skull. Anatomically, the scalp is part of the epicranium, a collection of structures covering the cranium. The scalp is bordered by the face at the front, and by the neck at the sides
These include hair, sweat glands, sebaceous glands, and sensory nerves. The skin is made up of three microscopic layers: epidermis, dermis, and hypodermis. The epidermis is composed of stratified squamous epithelium and is divided into the following five sublayers or strata, listed in order from outer to inner: Stratum corneum, Stratum lucidum,
The hair follicle is an organ found in mammalian skin. [1] It resides in the dermal layer of the skin and is made up of 20 different cell types, each with distinct functions.. The hair follicle regulates hair growth via a complex interaction between hormones, neuropeptides, and immune cells
The five layers of the scalp, from superficial to deep, can be memorized by using the mnemonic SCALP. The Skin of the scalp has been scientifically examined for thickness. [3] The posterior scalp skin thickness is 1.48 mm; [3] the temporal scalp is 1.38mm; [3] and the anterior scalp thickness is 1.18 mm. [3] The scalp contains approximately 100 ...
The head receives blood supply through the internal and external carotid arteries. These supply the area outside of the skull (external carotid artery) and inside of the skull (internal carotid artery). The area inside the skull also receives blood supply from the vertebral arteries, which travel up through the cervical vertebrae.
This provides sensation for the skin of the forehead, and for the front edge of the scalp. The other part, the deep division, runs into the occipitofrontalis muscle and provides frontoparietal sensation. [1] Blood supply to the forehead is via the left and right superorbital, supertrochealar, and anterior branches of the superficial temporal ...
a delicate cuticle next the hair, composed of a single layer of imbricated scales with atrophied nuclei; Huxley's layer; Henle's layer; The term "trichilemmal" refers to the outer root sheath. [2] The IRS functions to mould, adhere, as well as participate in the keratinization of growing hair. [3]
The temporoparietal fascia can serve as a donor tissue for reconstructive surgery.It affords reliable flaps with good blood supply when the tissues of the region are intact (however, prior lesions to the region may compromise the blood supply of the tissues; creating flaps from such compromised tissue is contraindicated due to a risk of subsequent ischaemic necrosis of the flap).