Integumentary System

1
Integumentary System

• Made of several organs including
• Skin
• Hair
• Nails
• Sweat glands
• Oil glands

2
The Integumentary System Protects
3
The Integumentary System Regulates Body
Temperature
4
The Integumentary System Synthesizes and Stores
Vitamin D Lipids
5
The Integumentary System Allows Sensations

• Touch
• Pressure
• Temperature
• Pain

6
The Integumentary System Excretes and Secretes

• Secretes
• Precursor to Vitamin D
• Melanin
• Excretes
• Water
• Urea
• Salts
• Milk

7
Structure of the Skin
8
Epidermis
9
Epidermis
10
Keratinocytes and Melanocytes



11
Thin vs Thick Skin
12
Thin vs Thick Skin
13
Stratum Corneum

• Dandruff

Corns and Calluses
14
Dermis of Skin
15
Dermis of Skin
16
Figure 05.06
17
Fingerprints
18
Reticular Layer of Dermis

• Wrinkles

Lines of Cleavage (Tension Lines)
19
Structures in the Dermis

• Blood vessels

20
Meissners Corpuscles
Structures in the Dermis
(Looks like cotton candy)
21
Pacinian Corpuscles
Structures in the Dermis
22
Structures in the Dermis

• Exocrine glands
• Muscles (Arrector pili)
• Hair
• Nails

23
Skin Color
24
Cyanosis
25
Accessory Structures of the Skin Hair
26
Hair Shaft and Hair Root
27
Figure 05.09a
28
Hair Shaft and Hair Root Have 3 Layers

• Medulla
• Cortex
• Cuticle

29
Hair Follicle and Hair Bulb
30
Hair Follicle and Hair Bulb
31
Figure 05.09bc
32
Functions of Hair

• Senses
• Guards
• Shields
• Protects

33
Hair Color
34
Sebaceous Glands
35
Figure 05.10bcd
36
Sebaceous Gland
37
Sudoriferous (Sweat) Glands
38
Sudoriferous (Sweat) Glands
Eccrine Sweat Glands
39
Apocrine Sweat Glands
Axillary Hair
Pubic Hair
40
Apocrine Sweat Glands (wide lumen)
Eccrine Sweat Glands (narrow lumen)
41
Ceruminous Glands
42
Figure 05.08
43
Nails
44
Toe Nail
45
Nail Root and Nail Matrix
46
Mammary Glands
47
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48
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49
Table 05.04