28a A&P - Integumentary System - tlcmassageschool.com · Classroom Rules" Punctuality -...
Transcript of 28a A&P - Integumentary System - tlcmassageschool.com · Classroom Rules" Punctuality -...
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28a A&P - Integumentary System
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28a A&P - Integumentary System !Class Outline"
5 minutes" "Attendance, Breath of Arrival, and Reminders "
10 minutes "Lecture:"
25 minutes "Lecture:"
15 minutes "Active study skills:"
60 minutes "Total"
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Quizzes:!! 29b Kinesiology Quiz"
– Supraspinatus, infraspinatus, teres minor, subscapularis, pec minor, & serratus anterior"
! 31a Written Exam Prep Quiz (20a, 20b, 21b, 22a, 23a, 24b, 29b, and 30a)"! 32a Written Exam Prep Quiz (24a, 25a, 26a, 27a, 28a, 29a, 30b, and 31b)"
Assignments:!! 30a Review Questions"
– Packet A: 139-156"
Preparation for upcoming classes: "! 29a Pathology: Integumentary System"
– Packet E: 59-64"– RQ Packet A-153"
! 29b Kinesiology: AOIs of glenohumeral and scapulothoracic joint muscles"
28a A&P - Integumentary System!Class Reminders"
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Classroom Rules"
Punctuality - everybody’s time is precious"
! Be ready to learn at the start of class; we’ll have you out of here on time"
! Tardiness: arriving late, returning late after breaks, leaving during class, leaving early"
The following are not allowed:!
! Bare feet"
! Side talking"
! Lying down"
! Inappropriate clothing"
! Food or drink except water"
! Phones that are visible in the classroom, bathrooms, or internship"
You will receive one verbal warning, then you’ll have to leave the room.!
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Serratus Anterior!Trail Guide, Page 86"
Serratus Anterior always seems to be well-developed in super heros."
It lies along the posterior and lateral rib cage. "
Most of serratus anterior is deep to the scapula with its insertion on the medial border of the scapula."
Serratus anterior, what does it do?"
Lateral View" Anterior View"
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Serratus Anterior!Trail Guide, Page 86"
Serratus Anterior always seems to be well-developed in super heros."
It lies along the posterior and lateral rib cage. "
Most of serratus anterior is deep to the scapula with its insertion on the medial border of the scapula."
Serratus anterior, what does it do?"
Lateral View"
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O"
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Lateral View"
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O"
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Lateral View"
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O"
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Lateral View"
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O"
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Lateral View"
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O"
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Lateral View"
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O"
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Lateral View"
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O"
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Lateral View"
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28a A&P - Integumentary System!E-55
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Introduction
The integumentary system includes the skin and its appendages such as hair, nails, and glands that produce oil or sweat ."
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The skin houses more than half a million sensory receptors of pressure, pain, heat, cold, movement, and vibration."
Introduction
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Skin is composed mostly of connective tissue underneath a layer of epithelial tissue."
Introduction
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No other body system is more easily exposed to infections, disease, pollution, or injury than the skin."
Introduction
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The appearance of the skin reflects our physiology including information about a person's nutrition, hygiene habits, circulation, age, immunity, genetics, and environmental factors."
Introduction
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Skin also mirrors our emotional self through muscular expression and neurological impulses."
Introduction
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Anatomy
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Skin"
Hair"
Nails"
Skin Glands"
Anatomy
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Skin covers 22 square feet and weighs 9 lbs."
A piece of skin the size of a quarter contains:"– 3 million cells"– 100 sweat glands"– 50 nerve endings"– 3 feet of blood vessels"
Fingertips have 700 touch receptors on a 2 square millimeters of surface area"
That is this big: "
Fun Facts
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Physiology
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Protection Physical, biologic, and chemical barrier."
Physiology
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Absorption Fat -soluble molecules and vitamins, steroids, resins of plants such as poison ivy and poison oak, and salts of heavy metals."
Physiology
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Sensation Extension of the nervous system. Receives stimuli such as pressure, pain, and temperature."
Physiology
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Body temperature regulation As blood moves to the skin's surface and blood "vessels dilate, heat is discharged. Heat can be dissipated through the
evaporation of sweat produced by sweat glands."
Physiology
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Waste regulation Eliminating wastes through sweating ."
Physiology
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Vitamin D synthesis Molecules in the skin are converted to vitamin D by the "
UV rays in sunlight (with a little help from liver and kidney enzymes)."
Physiology
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Immunity Langerhans cells trigger immunologic reactions."
Physiology
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Regions of the Skin
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Epidermis!
Dermis!
Subcutaneous layer!
Regions of the Skin
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Epidermis Outer region of the skin. Composed of epithelial cells."
Epidermis
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Keratinocyte Epidermal cell that produces keratin , a protein that waterproofs the skin."
Epidermis
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Melanocyte Epidermal cell that produces melanin , a pigment that contributes to skin color and decreases the amount of ultraviolet light that can penetrate into the deeper layers of the skin."
Epidermis
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Langerhans cell Epidermal cell that triggers immunologic reactions."
Epidermis
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Epidermal Layers (from deepest to most superficial):""Stratum germinativum""Stratum spinosum""Stratum granulosum""Stratum lucidum""Stratum corneum"
Epidermis
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Stratum germinativum Deepest epidermal layer. Through cell division it generates all of the other layers. Contains Merkel cells and pressure receptors."
Epidermis
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Stratum spinosum Bonding and transitional epidermal layer between germinativum and granulosum."
Epidermis
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Stratum granulosum Epidermal layer containing an accumulation of keratin granules."
Epidermis
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Stratum lucidum Translucent epidermal layer only found in the thick skin of palms and soles."
Epidermis
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Stratum corneum Outermost epidermal layer where cells are completely keratinized, not living , and ready to be sloughed off."
Epidermis
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It takes 21-27 days for cells created in the stratum germinativum to develop and
push upward through each of the other layers eventually dying and sloughing off!"
Fun Facts
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Dermis
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Dermis (AKA: corium, hide, true skin) Inner region of the skin. Contains blood vessels, sensory nerve receptors, hair follicles, muscles, sweat and oil glands, and connective tissue."
Dermis
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Scar A dense collection of new connective tissue that forms as the result of an injury to the dermis."
Dermis
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Subcutaneous Layer
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Subcutaneous layer (AKA: hypodermis or superficial fascia) Layer beneath the dermis but not a true layer of skin. Consists of loose connective tissue, fat, and nerve receptors."
Subcutaneous Layer
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Hair
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Hair Composed of keratinized filaments arising from pouch-like follicles located in the dermis. Protects the scalp from injury and UV radiation. Protects the eyes, nose, and ears from foreign particles."
Hair
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Arrector pili Tiny muscles attached to hair follicles that contract to pull the hair upright."
Hair
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! Straight hair has a shaft that is round."
! Wavy hair has a shaft that is oval."
! Curly or kinky hair has a shaft that is flat."
! Fine hair does not have a medulla (inner core)."
! White hair is lacking pigment in the medulla."
Fun Facts
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Skin Glands
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Sebaceous gland Skin gland that secretes sebum (oil) to lubricate both the hair and the epidermis."
Skin Glands
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Sudoriferous gland Skin gland that secretes sweat in response to excess heat. Types: eccrine (all over), apocrine (axilla, genitals)."
Skin Glands
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Nails
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Nail Compact keratinized cells that form the hard thin plates found on the distal surfaces of the fingers and toes. Protect the ends of fingers and toes. Used as tools for digging, scratching and manipulation of objects."
Nails
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Nervous System’s Role in Touch
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Discriminative touch Touch that is subtle and can be easily located on the skin."
Crude touch Touch that is more easily identified, but is more difficult to locate on the skin."
Nervous System’s Role in Touch
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Meissner corpuscle (AKA: tactile corpuscle) Receptor that mediates sensations of discriminative touch such as light versus deep pressure, as well as low-frequency vibration."
Nervous System’s Role in Touch
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Ruffini corpuscle Receptor that mediates deep or continuous pressure. They adapt slowly and permit the body to stay in contact with grasped objects. May also detect heat."
Nervous System’s Role in Touch
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Pacinian corpuscle Receptor that responds to crude and deep pressure, vibration, and stretch, and perceives proprioceptive information about joint positions."
Nervous System’s Role in Touch
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Krause end bulb Receptor involved in discriminatory touch and low-frequency vibration. May also detect cold."
Nervous System’s Role in Touch
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Merkel disk Receptor that responds to light touch and discriminative touch."
Nervous System’s Role in Touch
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Hair root plexus (AKA: hair follicle receptor) Receptor that responds to light touch and hair movement."
Nervous System’s Role in Touch
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28a A&P - Integumentary System