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How Hair Anatomy Can Help In Crime Scene Investigation?

Suppose the bodies were found and the crime scene investigators were called to the scene to investigate. One of the few things they find left on the victim or on the back of the car seat is human hair.

What is so special about the hair into a criminalist? You can refer to https://cognitech.com/cognitech-trisuite-14/videoactive14/ for lidar crime scene investigation cases. 

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In this article, we will discuss the anatomy of a human hair and what part of the hair is the focus of the forensic investigation.

Hair grows from the skin of the holes that contain very specialized cells called follicles. There are three things that make up a human hair shaft. Forensic scientists can use one of three things to find a match between a hair taken from victims and unknown hairs taken from the back of the car seat. 

Medulla: The middle section of hair is called the medulla which contains kill cells but looks as though it is a central tube is empty or full of mud. The internal diameter of the "tube" with regard to the overall diameter of the hair is called the medulla index. In humans, the medulla index was measured to be 0.3. 

If forensic scientists determine that hair found in the back seat of a car has a medullary index greater than 0.5, they can conclude that the hair is not human in origin. 

Cortex: External to the medulla is the cortex. It is the largest part of the shaft and a part that contains pigment, a substance that gives hair its colour. pigment particles display a variety of colours, shapes, and patterns of distribution. 

Cuticle: Cuticle refers to a layer of cells that covers the external surface of the shaft and resemble the scales on a fish or maybe the tiles on the roof. Forensic scientists take advantage of the pattern found in the cuticle to determine whether human hair and whether or not there is a match between these hairs to another.

Tiny hairs can not escape the prying eyes of an expert forensic scientist. Find a consistent pattern between the unknown and the known hair can bring crime scene investigators one step closer to solving the crime.