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Integumentary System (the skin, hair, and nails) Integument = covering Sports Training and Physiology Kociuba

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Page 1: Integumentary System (the skin, hair, and nails) Integument = covering Sports Training and Physiology Kociuba

Integumentary System(the skin, hair, and nails)

Integument = covering

Sports Training and Physiology

Kociuba

Page 2: 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

Page 3: Integumentary System (the skin, hair, and nails) Integument = covering Sports Training and Physiology Kociuba

Structure of the Skin

• Epidermis

• Dermis

• Subcutaneous

Tissue

Page 4: Integumentary System (the skin, hair, and nails) Integument = covering Sports Training and Physiology Kociuba

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

Page 5: Integumentary System (the skin, hair, and nails) Integument = covering Sports Training and Physiology Kociuba

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.

Page 6: Integumentary System (the skin, hair, and nails) Integument = covering Sports Training and Physiology Kociuba

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”

Page 7: Integumentary System (the skin, hair, and nails) Integument = covering Sports Training and Physiology Kociuba

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

Page 8: Integumentary System (the skin, hair, and nails) Integument = covering Sports Training and Physiology Kociuba

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

Page 9: Integumentary System (the skin, hair, and nails) Integument = covering Sports Training and Physiology Kociuba

Accessory Skin Structures

• Nails– Body– Root – Fold– Cuticle– Bed

**Consist of dead cells and hard keratin

Page 10: Integumentary System (the skin, hair, and nails) Integument = covering Sports Training and Physiology Kociuba

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

Page 11: Integumentary System (the skin, hair, and nails) Integument = covering Sports Training and Physiology Kociuba

Skin Cancer (3 types)

• Basal Cell Carcinoma– Most common

• Squamous Cell Carcinoma– Second Most Common

• Melanoma– Least Common– Most Deadly

Page 12: Integumentary System (the skin, hair, and nails) Integument = covering Sports Training and Physiology Kociuba

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)

Page 13: Integumentary System (the skin, hair, and nails) Integument = covering Sports Training and Physiology Kociuba

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)