Human Skin Basics
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Questions and Answers

What is the term 'skin' technically referring to?

  • Body covering of vertebrates only (correct)
  • Body covering of any animal
  • Body covering of fish only
  • Body covering of mammals only

What is the primary function of the skin in protecting the body?

  • Preventing the loss of body fluids
  • Regulating body temperature
  • Excreting waste products
  • Protecting the body from injury and harmful substances (correct)

What is the approximate weight of the skin of an average adult male?

  • 4.5 to 5 kg (correct)
  • 8 to 9 kg
  • 6 to 7 kg
  • 2.5 to 3 kg

What is the thickness of the skin on areas of the body that regularly rub against objects?

<p>Thickest, at around 4.0 to 5.0 mm (A)</p> Signup and view all the answers

What is the outer layer of the skin?

<p>Epidermis (B)</p> Signup and view all the answers

What is the function of the basement membrane?

<p>To anchor the epidermis and dermis together (B)</p> Signup and view all the answers

What is the skin's ability to repair itself after injury?

<p>Remarkable (C)</p> Signup and view all the answers

What is the skin's role in sensing the environment?

<p>It senses through the sense of touch (A)</p> Signup and view all the answers

Study Notes

Skin Basics

  • Skin refers to the body covering of vertebrates, including fish, reptiles, birds, and mammals.
  • Human skin is essential for survival, forming a barrier against harmful microorganisms and chemicals, preventing loss of body fluids, and protecting vital structures from injury and UV rays.

Skin Functions

  • Regulates body temperature
  • Excretes some waste products
  • Acts as an important sensory organ, containing specialized nerve cells responsible for the sense of touch

Skin Structure and Size

  • The skin is the body's largest organ, weighing 4.5-5 kg (10-11 lb) and covering 2 sq m (22 sq ft) in area
  • Skin thickness varies from 1.4-4.0 mm (0.06-0.16 in), with the thickest areas on the palms and soles of the feet
  • Composed of two layers: the epidermis (outer layer) and the dermis (inner layer)

Epidermis and Dermis

  • Epidermis: a tough, waterproof, protective layer
  • Dermis: thicker than the epidermis, providing strength and elasticity to the skin

Skin Layers and Connections

  • The epidermis and dermis are anchored by the basement membrane, a thin layer of tissue composed of interconnected molecules acting as ropes and grappling hooks
  • Below the dermis lies the subcutaneous layer, composed of protein fibers and adipose tissue (fat), containing glands and sensory receptors involved in the sense of touch.

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Description

Learn about the structure and functions of human skin, including its role in protecting the body and regulating body temperature.

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