Similarities
Pigs and humans both have skin composed of three layers: the epidermis, dermis, and hypodermis. The epidermis serves as a barrier against UV radiation, pathogens, and water loss. The dermis contains connective tissue, hair follicles, sweat glands, sebaceous glands, blood vessels, and nerve endings. The hypodermis, or subcutaneous layer, consists of fat cells that insulate the body, store energy, and provide cushioning.
Both species have hair and sweat glands, skin pigmentation from melanin, and skin appendages such as nails or hooves. Sensory nerve endings allow for touch, pressure, temperature, and pain perception, and both use sweating and shivering for thermoregulation.
Differences
Pigs have denser, more uniform hair distribution and fewer sebaceous glands than humans. Pigs have hooves instead of nails, are less efficient at sweating, and are more susceptible to sunburn and UV damage.
Understanding these similarities and differences supports comparative anatomy, biomedical research, and veterinary science.