INTEGUMENTARY

• Integumentary System


  Largest organ of the body that forms a physical barrier between the external environment and the internal environment that it serves to protect and maintain
• Function of Integumentary Glands


  • Protects your body from infection and injuries
  • Body's coat of armor and the first line of defense
  • Shields your body from harmful light and helps regulate your body temperature
  • Stores fat, water, glucose, and vitamin D, and helps support your immune system to protect you from diseases
• Components of Integumentary System

  • Skin
  • Nails
  • Hair
  • Glands
• Skin


  • Largest and heaviest organ in your body
  • Weighs about six pounds or more, and is approximately 2 millimeters thick
  • Thinner on Eyelids
  • Thicker on Soles of your feet
• Layers of the skin


  • Epidermis
  • Dermis
  • Hypodermis
• Epidermis


  • Part of your skin that you can see and touch
  • Gives your skin its color and provides a waterproof barrier
• Dermis


  • Middle layer of skin in your body
  • Thickest layer
  • Contains sweat and oil glands
• Hypodermis


  • Bottom layer of your skin
  • Fatty layer of your skin that helps insulate your body
• Skin Conditions and Disorders


  • Allergies
  • Dry skin
• Allergies


  • Contact dermatitis – skin's reaction to something in your environment that causes an itchy rash
  • Poison ivy rashes – allergic contact dermatitis that causes a very itchy rash caused by exposure to the oil urushiol
• Dry skin


  Have a rough texture of skin because it doesn't have enough moisture
• Nails


  • Protect the ends of your finger and toes
  • Nail plate, Nail bed, Cuticle, Matrix, and Lunula are the anatomy of your nail
• Nail Anatomy

  • Nail plate – hard part of your nail you can see
  • Nail bed – skin under your nail plate
  • Cuticle – thin skin at the base of your nail plate
  • Matrix – the "root" of your nail responsible for making it grow
• Nail Conditions and Disorders


  • Onychomycosis – Nail fungus in your fingernails or toenails
  • Onycholysis – When your nail separates from your nail bed
  • Paronychia – An inflammation or infection of the tissue directly surrounding your nail
• Hair


  • Helps keep heat in your body
  • Eyelashes and eyebrows help protect your eyes from dirt and water
  • Has a sensory function that protects you from UV radiation
  • Parts: Hair shaft, Hair follicle, Hair bulb
• Hair Conditions and Disorders

  • Alopecia areata – patches of hair loss caused by an autoimmune disease
  • Androgenic alopecia – baldness in both genders that is based on genetics
  • Anagen effluvium – loss of hair during it's growth phase
• Integumentary Glands


  • Sudoriferous glands
  • Sebaceous glands
  • Ceruminous glands
  • Mammary glands
• Sudoriferous Glands


  • Glands that secrete sweat through your skin
  • There are two types: eccrine glands and apocrine glands
• Sebaceous Glands


  Glands in the skin that produce sebum, an oily substance that lubricates the skin and protects it from drying out
• Ceruminous Glands


  Modified apocrine glands located in the skin of the human external auditory canal that produce ear wax, or cerumen
• Mammary Glands


  • Highly evolved and specialized organ developing on each side of the anterior chest wall
  • This organ's primary function is to secrete milk
• Gland Conditions and Disorders


  • Hyperhidrosis – Excessive sweating
  • Seborrheic Dermatitis – Scaly, red patches that affect your face, chest or back
  • Sebaceous Hyperplasia – Common in people who are older that causes small, yellowish bumps on your skin