Download Baby Blues

Integumentary
System
Read pp 96-111: HW: pg 114
S/A #1, 4, 6, 7, 12, 13
Clinic ?’s: #3, 5, 6
Epithelial Membranes
contain an
epithelial
sheet,
always
combined
with
connective
tissue
137.222.110.150/calnet/cellbio/page8.htm
Epithelial tissue types
• Cutaneous—skin
–exposed to air = dry membrane
www.acponline.org
Epithelial tissue types
• Serous—
–line internal cavities (never
exposed to outside)
–serous fluid (excreted by
both epithelial and
connective tissues),
reduction of friction
Types of serous membranes:
• Parietal—lines a
specific wall of ventral
body cavity.
• Visceral—covers the
outside of the organs of
the ventral body cavity.
academic.kellogg.cc.mi.us
Epithelial tissue types
• Mucous
–lines all body
cavities that
open to
exterior = wet
membranes
www.hopkinsmedicine.org
Connective Tissue
Membranes (aka synovial)
www.pennhealth.com
• line areas
surrounding
joints, bursae
(sacs of
connective
tissue) & tendon
sheaths.
Epithelial membrane
Functions
• Protects deeper tissues
from
–mechanical damage
–chemical damage
–bacterial damage
–UV radiation
–thermal damage
–dessication
Epithelial membrane
Functions
• Temperature regulation
• Aids in excretion of urea
and uric acid
• Synthesizes vitamin D
• Sensory input
• Controls permeability
Layers of the cutaneous
membrane
• Epidermis—outer five
layers—avascular
– Melanin—pigment responsible
for reducing skin damage from
UV
• Dermis—made up of dense
connective tissue, “hide”,
firmly connected to epidermal
layer. Thickness varies
• Hypodermis—layer of fat
www.aboutadvice.com
Appendages of the skin
www.mc.vanderbilt.edu
• Hair—guard
head, eyes,
respiratory tract,
insulation
• Receptors
• Nails—scalelike modification
of epidermis;
transparent
Appendages of the skin
• Skin glands
– Sweat/sudoriferous
glands-- > 2.5 million!
www.scf-online.com
• eccrine—produce
sweat, found all over
• apocrine—usually
found in axillary and
genital areas; milky
secretions; precise
function is unknown.
Appendages of the skin
• Sebaceous glands—oil glands
– not on palms or soles of feet,
ducts usually empty into a hair
follicle.
www.acne-resource.org
Skin Disorders or
Problems
• Herpes
simplex
–cold sores,
fluid filled
blisters
www.mummila.net
www.004.cz
www.dartmouth.edu
Skin Disorders or
Problems
www.uzleuven.be
• Cyanosis
–poor blood circulation;
turning skin/blood bluish
Skin Disorders or
Problems
• Acne—
infection of
sebaceous
glands
www.myzeno.com
Skin Disorders or
Problems
• Skin
cancer
–most
common
cancer
www.pueblo.gsa.gov
www.cbc.ca
www.helenafamilypodiatry.com
Skin Disorders or
Problems
• Athlete’s foot
–itchy, red,
peeling
condition
between
toes; fungal
infection
www.cmsp.com
bms.brown.edu
orpreform.typepad.
om
Skin Disorders or Problems
• Third degree
burns
–body loses fluid,
destroys entire
thickness of
skin, can lead to
infection.
Skin Disorders or Problems
• Blister
www.parktrust.org
–friction
between
epidermis and
dermis
causes
separation of
the layers.