What Scalp to Know

The scalp is a specialized area of skin that covers the skull. It is made up of five layers: the skin, the subcutaneous tissue, the galea aponeurotica, the loose areolar tissue, and the periosteum.

Skin

The skin of the scalp is thicker than the skin on other parts of the body. It contains a large number of hair follicles, sebaceous glands, and sweat glands. The hair follicles produce hair, which helps to protect the scalp from the sun and cold. The sebaceous glands produce sebum, which helps to keep the scalp moisturized. The sweat glands produce sweat, which helps to cool the scalp.

Subcutaneous Tissue

The subcutaneous tissue is the layer of fat and connective tissue that lies beneath the skin. It helps to cushion the scalp and protect it from injury.

Galea Aponeurotica

The galea aponeurotica is a thin, fibrous sheet of tissue that covers the top of the skull. It helps to hold the scalp in place.

Loose Areolar Tissue

The loose areolar tissue is the layer of connective tissue that lies between the galea aponeurotica and the periosteum. It allows the scalp to move freely over the skull.

Periosteum

The periosteum is the thin, fibrous membrane that covers the skull. It helps to protect the skull from damage.

The scalp is a complex structure that plays an important role in protecting the brain. It is also a major source of blood supply to the brain.