Integumentary System Flashcards
What are the functions of nails?
To serve as hard protective plates that help prevent skin of fingers or toes from getting cut/scraped during daily activities, enhance sensation and precision of movements
Ungu/o
Onych/o
Nail
What is H and what is its function?
Sebaceous gland
Excretes sebum which:
- Keeps hair follicles soft and pliable
- Has bactericidal + fungicidal properties, preventing infection
- Lubricates skin to prevent evaporation of water which can lead to dryness and cracking
What is E?
Sudoriferous/sweat gland (eccrine)
Name the 5 components of the integumentary system
Skin, hair, nails, glands, ducts
Describe the structure of nails
Hard protective keratin plates consisting of the eponychium (cuticle), hyponychium (below cuticle), perionychium (around cuticles)
Describe 3rd-degree burns
Damage epidermis, dermis, hypodermis, dry skin because sweat glands in dermis are destroyed, muscle and bone may be visible, little to no pain because nerve endings in dermis are already destroyed
Explain how the integumentary system helps with the formation of vitamin D
- Skin exposed to UV light which initiates formation of vit D
- This helps with producing calcium for strong bones etc
Compare apocrine vs eccrine glands
- Eccrine: open to skin, smaller, more numerous, thermoregulation
- Apocrine: open to hair, larger, less numerous, acted upon by bacteria > produce odour
5 ways to maintain a healthy integumentary system
- Appropriate hygiene e.g. washing hands regularly to remove potential pathogens from skin
- Eat a well-balanced diet e.g. water helps maintain skin elasticity
- Protect skin e.g. sunscreen to decrease damage to epidermis
- Moisturise skin to maintain skin integrity/prevent dryness and cracking
- Regularly examine skin so any abnormalities are detected earlier = greater chance of successful treatment
Locations of sebaceous glands
Scalp, face, groin, armpit (not on palms and soles)
Describe how the integumentary system helps with excretion
- Sudoriferous (excrete sweat> SALT AND WATER) glands: curly, apocrine open to hair follicle, eccrine open to skin
- Sebaceous (oil) glands- attach to hair, EXCRETE sebum (oil)
Acronym for function of integumentary system
PASTED - protection, absorption, sensation, thermoregulation, excretion, vitamin D
What is B and describe its structure
Epidermis
- Most superficial layer of skin, contains melanocytes (synthesise melanin> pigment that gives skin colour), and keratinocytes (synthesise keratin for waterproof skin) no blood vessels, nerves or hair
Duct vs pore
Ducts are pathways for sebum/sweat whereas pores are openings to the skin