Medulla

The medulla refers to the innermost part of the hair shaft and is in various Hair types differently pronounced. It consists of a soft, loose arrangement of cells and air chambers that can give the hair additional insulation and sometimes stiffness. The presence and structure of the medulla vary greatly depending on hair type, age, and even within different hairs of the same person.

Properties of the medulla

• Variability : Not all hairs have a medulla. Fine and light hair often has no medulla, while thick and dark hair usually has a clearly visible medulla.
• Structure : The medulla can be continuous, interrupted, fragmented, or even absent. This structure depends on genetic factors and is often more pronounced in animals than in humans.
• Function : The exact function of the medulla in human hair is not fully understood. In animals it contributes to thermal insulation. In humans, it is thought to contribute to the mechanical strength of hair, but its functional significance remains unclear.

Examination of the medulla

In forensic science, the medulla is often examined to identify and differentiate hair samples because its structure can vary among different species and within different individuals. This can be helpful in solving crimes or identifying people.

Medulla and hair care

For everyday hair care and health, the medulla plays a minor role compared to other parts of the hair such as the cortex and the Cuticle. Damage to the medulla from chemical treatments or heat is less worrisome than damage to the cortex, which is responsible for hair strength and elasticity.

conclusion

Although the medulla is an integral part of the hair structure, its visibility and function is less critical in humans than in other mammals. Research into the role of the medulla in hair health and function remains an interesting field, particularly in relation to its potential importance in forensic science and biology.

Similar terms

• hairline
• Hair follicles
• Hair cortex
• Hair cortex
• hair shaft