The Integumentary System: Powerpoint Lecture Slides Prepared by Meg Flemming Austin Community College
The Integumentary System: Powerpoint Lecture Slides Prepared by Meg Flemming Austin Community College
The Integumentary System: Powerpoint Lecture Slides Prepared by Meg Flemming Austin Community College
prepared by
Meg Flemming
Austin Community College
C H APT E R 5
The
Integumentary
System
2013 Pearson Education, Inc.
Chapter 5 Learning Outcomes
5-1
Describe the main structural features of the epidermis, and explain
the functional significance of each.
5-2
Explain what accounts for individual differences in skin color, and
discuss the response of melanocytes to sunlight exposure.
5-3
Describe the interaction between sunlight and vitamin D 3
production.
5-4
Describe the structure and functions of the dermis.
5-5
Describe the structure and functions of the hypodermis.
2. Dermis (deep)
Accessory structures
. Hair, nails, and some exocrine glands
Accessory Structures
Cutaneous Membrane
Hair shaft
Epidermis
Pore of sweat
Papillary layer gland duct
Dermis Touch receptor
Reticular layer Sebaceous gland
Hair follicle
Pressure receptor
Hypodermis
Nerve fibers
Sweat gland
Artery
Cutaneous
Vein plexus
Fat
2. Temperature maintenance
Skin regulates heat exchange with the environment
Surface
Stratum
corneum
Stratum
lucidum
Stratum
granulosum
Stratum
spinosum
Stratum basale
Basement
membrane
Dermis
Thick skin LM x 210
Epidermis is avascular
Ridges and papillae increase surface area for diffusion
between dermis and epidermis
Role of pigmentation
Carotene is orange-yellow, accumulates in epidermis, and
comes from orange-colored foods
Melanin is brown, yellow-brown, or black, produced by
melanocytes near stratum basale cells, absorbs ultraviolet
(UV) radiation protecting deeper layers
Melanocytes
in stratum
basale
Melanin
pigment
Basement
membrane
Melanocytes LM x 600
Melanosome
Melanin
pigment
Melanocyte
Basement
membrane
2013 Pearson Education, Inc.
Skin Color (5-2)
Skin cancers
Basal cell carcinoma is most common
Accessory Structures
Cutaneous Membrane
Hair shaft
Epidermis
Pore of sweat
Papillary layer gland duct
Dermis Touch receptor
Reticular layer Sebaceous gland
Hair follicle
Pressure receptor
Hypodermis
Nerve fibers
Sweat gland
Artery
Cutaneous
Vein plexus
Fat
13. List the two terms for the tissue that connects
the dermis to underlying tissues.
Sebaceous gland
Hair shaft
Hair
Hypodermis
Hair shaft
Sebaceous
Boundary gland
between Arrector
hair shaft pili muscle
and
hair root
Hair root
Connective
tissue sheath
Hair matrix
Hair papilla
Connective tissue
sheath
Wall of hair follicle
Cuticle of hair
Cortex of hair
Medulla of hair
Hair removed
Sebaceous follicle Sebaceous gland
Wall of hair follicle
Basement
membrane
Epidermis
Discharge of
sebum
Dermis
Breakdown of
cell membranes
Mitosis and growth
Hypodermis Basal cells
Sebaceous gland LM x 150
Merocrine Sweat
duct pore
Hair shaft
Apocrine duct
Epidermis
Dermis
Hypodermis
Artery Vein
Merocrine Apocrine sweat Merocrine
sweat gland gland sweat gland
(sectioned)
2013 Pearson Education, Inc.
Modified Sweat Glands (5-7)
Mammary glands
Secrete milk
Ceruminous glands
Secrete a waxy substance that combines with
sebaceous oils to form earwax
Nail bed
Deeper level of epithelium covered by nail body
Nail root
Where the nail is produced
Covered by the cuticle
Lunula
Pale crescent near root
Free edge
Nail body
Scab formation
A blood clot that forms on the surface
Granulation tissue
Is formed from the combination of the fibrin blood clot,
fibroblasts, and capillaries
Macrophages clean up debris
Epidermis
Dermis
Mast cells
Migrating
epithelial
cells
Macrophages
and fibroblasts
Granulation
tissue
Fibroblasts
Scar
tissue
(page 188)
Skeletal
provides mechanical protection
against environmental hazards. It
forms the external surface of the
body and provides protection from
dehydration, environmental
(page 241)
Muscular
chemicals, and external forces.
The integument (skin) is separated
and insulated from the rest of the
body by the hypodermis layer, but
it is interconnected with the rest
(page 302)
Nervous
of the body by an extensive
circulatory network of blood and
lymphatic vessels. As a result,
although the protective
mechanical functions of the skin
(page 376)
Endocrine
can be discussed independently,
its physiological activities are
always closely integrated with
those of other systems.
(page 467)
vascular
Cardio-
(page 500)
Lymphatic
Respiratory
(page 532)
(page 572)
Digestive
(page 637)
Urinary
Reproduc-
(page 671)
tive
2013 Pearson Education, Inc.
Checkpoint (5-10)