Integumentary System Of Human
Integumentary system

The integumentary system is the organ system that protects the body from various kinds of damage, such as loss of water or abrasion from outside.

The integumentary system comprises the skin, hair and nails.

The integumentary system has a variety of functions; it may serve to waterproof, cushion, and protect the deeper tissues, excrete wastes, and regulate temperature, and is the attachment site for sensory receptors to detect pain, sensation, pressure, and temperature.

The integumentary system also provides for vitamin D synthesis.
 
The Nail

A nail is a horn-like envelope covering the dorsal aspect of the terminal phalanges of fingers and toes in humans. Fingernails and toenails are made of a tough protein called keratin. The nail consists of the nail plate, the nail matrix and the nail bed below it, and the grooves surrounding it.

A healthy finger nail has the function of protecting the distal phalanx, the fingertip, and the surrounding soft tissues from injuries.

In humans, nails grow at an average rate of 3 mm a month.

 
The Skin
The human skin is composed of a minimum of 3 major layers of tissue: the epidermis; dermis; and hypodermis.

The epidermis : This is the top layer of skin. It does not contain blood vessels. Its main function is protection, absorption of nutrients, and homeostasis. The major cell of the epidermis is the keratinocyte, which produces keratin. Keratin is a fibrous protein that aids in protection. Keratin is also a water-proofing protein. Millions of dead keratinocytes rub off daily. The majority of the skin on the body is keratinized, meaning waterproofed. The only skin on the body that is a non-keratinized is the lining of skin on the inside of the mouth. Non-keratinized cells allow water to "stay" atop the structure. The protein keratin stiffens epidermal tissue to form fingernails. Nails grow from thin area called the nail matrix; growth of nails is 1 mm per week on average.

The dermis :The dermis is the middle layer of skin. The dermis has two layers. One is the papillary layer which is the superficial layer and consists of the areolar connective tissue. The other is the reticular layer which is the deep layer of the dermis and consists of the dense irregular connective tissue.These layers serve to give elasticity to the integument, allowing stretching and conferring flexibility, while also resisting distortions, wrinkling, and sagging.

The hypodermis : The hypoderis is the bottom layer of the integumentary system.
skin hair
 
Functions of integumentary system
The integumentary system has multiple roles in homeostasis. All body systems work in an interconnected manner to maintain the internal conditions essential to the function of the body. major functions are listed below
  • Protect the body’s internal living tissues and organs
  • Protect against invasion by infectious organisms
  • Protect the body from dehydration
  • Protect the body against abrupt changes in temperature, maintain homeostasis
  • Help excrete waste materials through perspiration
  • Act as a receptor for touch, pressure, pain, heat, and cold.
  • Protect the body against sunburns by secreting melanin
  • Generate vitamin D through exposure to ultraviolet light
  • Store water, fat, glucose, and vitamin D
  • Maintenance of the body form
  • Formation of new cells from stratum germinativum to repair minor injuries
 
 
 
Science

Change in state of water
Water and it's states
Spheres of the earth
Nutrients & Deficiency Of Nutrients & It's Effect
Interesting Facts About Human Organs
Circulatory system
Digestive system
Endocannabinoids system
Endocrine system
Excretory system
Integumentary system
Immune system
Lymphatic system
Nervous system
Respiratory system
Musculoskeletal system
Vestibular system

 
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