The Histology Guide
- Skin is the largest organ of the body.
- It has an area of 2 square metres (22 square feet) in adults, and weighs about 5 kilograms
- The thickness of skin varies from 0.5mm thick on the eyelids to 4.0mm thick on the heels of your feet.
- Skin is the major barrier between the inside and outside of your body!
Skin has a number of functions:
- PROTECTION: it protects against UV light, mechanical, thermal and chemical stresses, dehydration and invasion by micro-organisms.
- SENSATION: skin has receptors that sense touch, pressure, pain and temperature.
- THERMOREGULATION: various features of the skin are involved in regulating temperature of the body. For example sweat glands, hair, and adipose
- METABOLIC FUNCTIONS: subcutaneous adipose tissue is involved in production of vitamin D, and triglycerides.