Different parts of the nail matrix contribute differently to nail thickness
Studies indicate about 79 % of the thickness of the nail plate comes from the nail matrix, while the remaining 21 % is contributed by the nail bed — overturning the notion
The brain of adult men is approximately 10% larger than that of women. Because men are typically taller and have more muscle mass than women, their brains require more neurons to control the body.
Nipples don’t have muscle inside them — the erection of the nipple happens because of tiny smooth muscle fibers in the areola that contract in response to cold, touch, or sexual arousal.
Sexual Activity is Associated with Changes in Inflammatory Biomarkers. In older adults (average age ~66), research shows more frequent sexual activity relates to lower levels of inflammation biomarkers such as C‑reactive protein (CRP) and fibrinogen.
