Transcript The Integumentary System

The Integumentary
System
Chapter 5
Introduction
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The integumentary system consists of hair, skin,
and nails.
Skin accounts for approximately 7% of total
body weight (9-11 lbs) and varies in thickness
(1.5 mm to 4.0 mm).
Skin is composed of two distinct regions.
LAYERS OF SKIN
SKIN FUNCTIONS
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Protection
Body temperature regulation
Cutaneous sensation
Metabolic functions
Blood reservoir
Excretion of wastes
EPIDERMIS
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Cell Types
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Keratinocytes
Melanocytes
Langerhans’ cells
Merkel cells
EPIDERMIS
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Layers
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Stratum basale
Stratum spinosum
Stratum
granulosum
Stratum lucidum
Stratum corneum
DERMIS
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Underlies the epidermis
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Composed of two layers
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Papillary layer= areolar loose connective tissue
Reticular layer= dense irregular connective
tissue (80%)
Contains many nerve endings
DERMIS
Review Question
What is the name of the inner-most layer
of the epidermis?
a. Hypodermis
b. Stratum basale
c. Stratum corneum
d. Dermis
e. Stratum lucidum
Review Question
Which layer of the dermis contains dense
regular connective tissue?
a. Hypodermis
b. Papillary layer
c. Reticular layer
d. Stratum spinosum
e. Stratum granulosum
SKIN PIGMENTATION
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Melanin
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Carotene
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Hemoglobin
ACCESSORY OGRANS
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Sweat glands
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Eccrine
Apocrine
Ceruminous
Mammary
Sebaceous glands
ACCESSORY ORGANS
ACCESSORY ORGANS
Review Question
Which of the following refers to a modified
sweat gland found in the external auditory
meatus where it produces wax?
a. Apocrine gland
b. Eccrine gland
c. Sebaceous gland
d. Ceruminous gland
e. Mammary gland
Review Question
Which of the following terms refers to the cuticle
of the nail?
a. Eponychium
b. Hyponychium
c. Lunula
d. Matrix
e. Root
SKIN DISORDERS
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Skin cancer
SKIN CANCERS
Skin Cancer Video
SKIN DISORDERS
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Skin cancer
Burns
SKIN DISORDERS
Rule of Nines
SKIN DISORDERS
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Skin cancer
Burns
Rosacea
ROSACEA
SKIN DISORDERS
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Skin cancer
Burns
Rosacea
Dermatitis
Contact dermatitis
Acne
Jaundice
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Seborrhea
Hirsutism
Alopecia
Impetigo
Psoriasis
Albinism
Striae