integumentary system (the skin, hair, and nails) integument = covering sports training and...
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Integumentary System(the skin, hair, and nails)
Integument = covering
Sports Training and Physiology
Kociuba
Integumentary System - Objectives
• Recall the structures of the Integumentary system
• Discuss all the major functions of the integumentary system
• Explain the dangers your body may encounter with the integumentary system
• Describe how the integumentary system changes as you age
Structure of the Skin
• Epidermis
• Dermis
• Subcutaneous
Tissue
Epidermis
• Has no blood vessels
• It is nourished by the dermis and the diffusion of the capillaries that are close to the surface of the dermis
• Typically cells are called keratinocytes because the produce keratin which makes cells hard
• Exfoliating gets rid of the Epidermis
Are you thick skinned?
• Skin is classified as thick or thin based upon the epidermis.
• Most skin found on the palms of your hands and the soles of your feet are thick.– Found in areas subject to
much pressure
• Thin skin is found around the rest of your body– More flexible than thick
skin.
Dermis
• The dermis is connective tissue with blood vessels providing nourishment
• The main connective tissue that is found in the dermis is collagen
• It resides under the Epidermis and is considered “new skin”
Subcutaneous/Hypo Dermis
• Not considered part of the skin
• Mainly adipose tissue (fat)
• Approx ½ of our stored fat is found in this layer
• The subcutaneous tissue connects the skin to the underlying bone and muscle
Accessory Skin Structures
• Hair Structure– Shaft: protrudes
above the surface of the skin
– Root: below the surface
– Hair bulb: base of the root
– Hair follicle: tube like bulb where the hair develops
Accessory Skin Structures
• Nails– Body– Root – Fold– Cuticle– Bed
**Consist of dead cells and hard keratin
Functions of the Integumentary System
• Protection– Infection– Abrasions– Ultraviolet light
• Sensation– Detect heat, cold,
pressure and pain
• Temperature Regulation– Sweat
• Vitamin D production– When exposed to
ultraviolet light, produces a molecule that can make vitamin D
• Excretion– Small amounts of
waste can be excreted through glands in the skin
• Sweat
Skin Cancer (3 types)
• Basal Cell Carcinoma– Most common
• Squamous Cell Carcinoma– Second Most Common
• Melanoma– Least Common– Most Deadly
Early Detection - ABCDE
• A: Asymmetry (one side doesn’t match the other)
• B: Border Irregularity (edges are ragged, notched, or blurred)
• C: Color (pigmentation is not uniform)
• D: Diameter (greater than 6mm)
• E: Evolving (lesion changes over time)
Aging and the Skin
• Epidermis thins as you age
• The collagen production in the dermis decreases (wrinkling)
• Decrease in elastic fibers in the dermis (wrinkling)
• Age spots
• Grey or white hair (melanin production decreases)