The integumentary system summary

Skin:  The skin is the most important organ of the body.

Epidermis:  are keratinized and dead cells that make the skin waterproof

Dermis:   The sweat glands are present in this layer that collect waters and waste products from the blood stream. The hair roots are also present in this layer that help in the growth of hair.

Subcutaneous Layer: body temperature is also maintained within this layer by insulating the body to the temperature fluctuations.

Thermoregulation: with  evaporation of the sweat and regulation of the blood flow to the dermis.
Sensations: The cutaneous sensations like touch, pressure, vibration, pain, cold  are felt by the skin.
Protection: The protective barrier of the skin helps prevent diseases, infections, dehydration, etc.
Production of Vitamin D: helps in the production of vitamin D

Hair:  functions of the hair include protection and sensation to light touch. The hair is made of dead, keratinized cells that are bound together with the extracellular proteins.

Nails:  functions : is to help in grasping and holding things. The nails act as counter force and help increase the sensitivity of the fingertip.

Sweat Glands:  that have an opening through the skin pores, help in excretion of waste matters from the circulatory system.