Medically reviewed by Brendan Camp, MD Key Takeaways The skin is the body's largest organ and helps protect internal organs ...

The integumentary system is the physical system that forms the barrier between the external environment and the internal systems of the body. In humans, this system consists of skin, hair, nails, and ...

Anemia may cause nail irregularities alongside other symptoms. Signs of anemia nails include pale nail beds and spoon-shaped nails. Red blood cells are responsible for carrying oxygen around the body.