Integumentary System
Skin, hair and nails — the body's largest organ and its first line of defence.
Skin is the body's largest organ, forming a physical and immune barrier against the outside world while regulating temperature and enabling touch. Hair and nails are specialised extensions of skin, each with their own growth cycles that respond to nutrition, hormones and age.
How it connects
Digestive system →
Gut inflammation is linked to several inflammatory skin conditions.
Common goals
Deep-dive guides in the integumentary system
Conditions involving this system
Did you know?
- • Skin fully renews its outer layer roughly every four weeks.