As a biological expert with a focus on human anatomy and physiology, I am well-versed in the intricacies of human hair growth and its functions. Let's delve into the similarities and differences between underarm hair and pubic hair, two types of body hair that are often compared due to their onset during puberty.

Firstly, it is essential to understand that all hair on the human body, including underarm and pubic hair, is composed of the same basic structures: the hair shaft, hair root, and hair follicle. However, the characteristics of hair can vary significantly based on its location on the body.

Underarm hair typically begins to grow during adolescence, coinciding with the onset of puberty. This hair is classified as androgenic hair, meaning it is influenced by the presence of androgens, primarily testosterone. The development of underarm hair is part of the body's natural response to hormonal changes, which stimulate the growth of hair in various regions.

Pubic hair, on the other hand, also emerges during puberty and is similarly influenced by androgens. However, pubic hair has a distinct role in sexual maturation, serving as a visual cue for sexual development and potentially playing a role in sexual attraction.

While both types of hair are influenced by hormones and share the same basic structure, there are differences in their function and characteristics. Underarm hair is often finer and lighter in color compared to pubic hair, which tends to be coarser and darker. This can be attributed to the density of the hair follicles and the amount of pigmentation in the hair shaft.

Another point of interest is the role of apocrine sweat glands, which become active during puberty. These glands are found in areas rich with body hair, such as the armpits and pubic regions. They secrete an oily substance that contains proteins and pheromones, which may contribute to body odor and play a role in sexual attraction.

It is also worth noting that the growth pattern of underarm and pubic hair can differ. Underarm hair tends to grow in a more scattered pattern, while pubic hair follows a more defined and specific growth pattern, often in a triangular shape for females and a diamond shape for males.

In conclusion, while underarm hair and pubic hair share some similarities, such as the influence of hormones and the presence of apocrine sweat glands, they are not the same. Each type of hair has its unique characteristics, functions, and growth patterns that distinguish it from the other.

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This is perhaps backed up by the fact that unlike hair on your head, armpit and thick pubic hair tend to show up during puberty, around the same time your apocrine sweat glands become active and begin secreting an oily substance containing a variety of proteins and the like.Jun 17, 2014read more >>