Hello there, I'm a specialist in the field of human anatomy and physiology. It's a pleasure to share my knowledge with you. Let's delve into the fascinating topic of human hair and its dimensions.

Human hair is a remarkable feature of our body, serving various functions such as protection, sensation, and expression. It's composed primarily of a protein called keratin, which gives it strength and structure. The hair follicle, located in the dermis of the skin, is where hair growth begins, and it's regulated by a complex interplay of hormones and genetic factors.

Now, coming to the specific question about the thickness of a human hair, it's an interesting subject that involves a bit of science and measurement. The average diameter of a human hair strand is approximately 0.002 to 0.005 inches (0.05 to 0.13 millimeters). This range can vary significantly among individuals and is influenced by factors such as genetics, ethnicity, and health.

To address the question directly, if we consider the average diameter of human hair to be around 0.004 inches, which is a commonly cited figure, we can calculate how many thousandths of an inch this represents. Since one inch is composed of 1000 thousandths (1 inch = 1000/1000 = 1000 thousandths), a hair strand that is 0.004 inches thick would be 4 thousandths of an inch.

However, it's important to note that the provided reference suggests a calculation involving division by 12, which seems to be a misunderstanding. The number 12 is not relevant to the calculation of thousandths of an inch for hair thickness. The correct approach is simply to recognize that 0.004 inches is equivalent to 4 thousandths of an inch, without any further division.

It's also worth mentioning that hair thickness can vary along the length of a single hair strand and between different individuals. The diameter at the root is typically thicker than at the tip, and people with thicker hair may have strands that are closer to 0.005 inches, while those with finer hair might have strands closer to 0.002 inches.

In conclusion, understanding the dimensions of human hair is a fascinating exploration into the intricacies of our biology. The average human hair is approximately 4 thousandths of an inch in diameter, a detail that speaks to the remarkable precision and complexity of our natural design.

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The thinnest [human hair thickness] is about 2 thousandth of an inch in diameter. The thickest can be about 6 thou'. Most is around 0.004 inches.May 31, 2009read more >>