Anatomy and Physiology for the EMT-Basic. Learning Objectives Identify the following terms: medial,...
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Transcript of Anatomy and Physiology for the EMT-Basic. Learning Objectives Identify the following terms: medial,...
![Page 1: Anatomy and Physiology for the EMT-Basic. Learning Objectives Identify the following terms: medial, lateral proximal, distal, superior, inferior, anterior,](https://reader035.fdocuments.in/reader035/viewer/2022062516/56649e205503460f94b0b329/html5/thumbnails/1.jpg)
Anatomy and Physiology for the EMT-Basic
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Learning Objectives
• Identify the following terms: medial, lateral proximal, distal, superior, inferior, anterior, posterior, midline, right, left, bilateral, mid-clavicular, mid-axillary
• Describe the anatomy and function of the following major body systems: respiratory, circulatory, musculoskeletal, nervous, and endocrine.
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Introduction
• As a EMT-B you will be faced with patients that complain of a wide variety of illnesses and injuries.
• To adequately asses and treat the sick or injured patient, the EMT-B must have a basic knowledge of where the structures of the body are (anatomy) and how they work (physiology).
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You have to be able to speak the
language…
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Anatomical Terms
• Normal anatomical
position– The position that a
patient is in when
determining terms.– Person standing,
facing forward– Palms facing forward
Looks something like this:4-1.jpg
Cranium
FaceMandibleNeck
Shoulder
Arm
Elbow
Forearm
Thigh
Knee
Leg
Ankle
Foot
Thorax
Abdomen
PelvisWristHand
Lo
wer extrem
ityTo
rsoH
ead
Up
per
ext
rem
ity
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Anatomical Planes
• Midline– Imaginary line drawn vertically through the
middle of the body (Nose to umbilicus (belly button)) that divides the body into right and left
• Mid-axillary– Imaginary line drawn vertically from the
middle of the armpit to the ankle dividing the body into anterior and posterior (front and back).
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Anatomical Planes
• Medial– Toward midline
• Lateral– Away from midline
• Proximal– Toward center
of the body
• Distal– Away from center of
body
Midline
MedialLateral
LeftRight
Mid-clavicular
Pro
xim
al
Dis
tal
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Anatomical Planes
• Superior– Means something
higher (closer to the head)
• Inferior– Lower,
away from head
• Anterior– Front
• Posterior– Back
Mid-axillary line
Posterior(dorsal)
Anterior(ventral)
Superior
Inferior
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Anatomical Planes
• Right and Left– Your patient’s right and left!
• Mid-clavicular– Line that runs down the middle of the clavicle (the
nipple of the breast usually is mid-clavicular)
• Bilateral– Both sides
• Dorsal – Back side, or top (dorsal fin of fish)
• Ventral– Opposite of Dorsal, front side
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Ventral
Dorsal
Having a bad day
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Anatomical Planes-Descriptive Terms
• Plantar– NO, not one who plants…but rather the bottom of the
foot
• Palmar– Gee, Mr. Obvious…I never made the connection
• Supine– Lying down on back
• Prone– Lying down on front
• Fowler’s– Seated, head up- 45-60 degrees
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Anatomical Planes-Descriptive Terms
• Trendelenburg– Supine, feet elevated, head down
• Shock position– Modified Trendelenburg, supine with
legs elevated 12-16”
• Lateral recumbent– “recovery position”, laying on side
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Body Systems
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MusculoskeletalSystem
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Musculoskeletal System
• Function– Gives body shape– Protects vital organs– Provides for body movement
• Components– Bones, joints, connective tissues
and muscles
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Bones• Skull-houses and protects the brain• Face
– Orbit– Nasal bone– Maxilla– Mandible– Zygomatic bones (cheeks)
• Spinal Column (33 vertebrae)– Cervical (neck) 7 vertebrae– Thoracic (upper back) 12 vertebrae– Lumbar (lower back) 5 vertebrae– Sacral (back wall of pelvis) 5 vertebrae– Coccyx (tail bone) 4 vertebrae
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Bones
• Thorax– Ribs
• 12 pairs• Attached posterior to the thoracic vertebrae• Pairs 1-10 attached anterior to the sternum• Pairs 11 and 12 are “floating”
• Sternum (breast bone)– Manubrium (superior portion of sternum)– Body (middle part)– Xiphoid process (inferior portion of sternum)
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Bones• Pelvis• Iliac crest (wings of pelvis)• Pubis (anterior portion of pelvis)• Ischium (inferior portion of pelvis)• Lower extremities
– Greater trochanter (ball) and acetabulum (socket of hip bone) make up hip joint
– Femur (thigh)– Patella (kneecap)– Tibia (shin, lower leg)– Fibula (lower leg) “tell a little fib”
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Bones– Medial and lateral malleolus are surface
landmarks of ankle joint– Tarsals and metarsals– Calacneus– Phalanges
• Upper extremities– Clavicle (collar bone)– Scapula (shoulder blade)– Acromion (tip of shoulder)– Humerus (superior portion of upper extremity)– Olecranon (elbow)
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Bones
– Radius (lateral bone of the forearm)– Ulna (medial bone of the forearm)– Carpals (wrist)– Metacarpals (hand)– Phalanges
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Joints
• Where bones connect to other bones– Ball and socket– Hinge– Fixed
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Now it’s your turn!
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Connective Tissue
• Ligaments– Hold joints together
• Tendons– Attach muscle to bone
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Muscle Types
• Voluntary (skeletal)– May also attach muscles to bones– Form major muscle mass in the body– Under control of the nervous system
and the brain; can be contracted and relaxed by the will of the patient
– Responsible for movement
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Muscle Types
• Involuntary (smooth)– Found in the walls of the tubular structures of
the gastrointestinal tract and the urinary system as well as blood vessels and bronchi
– Control the flow of blood through these structures
– Carry out automatic muscular functions of the body
– Patients have no direct control over these muscles
– Respond to stimuli such as stretching, heat and cold
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Types of muscle
• Cardiac– Found only in the heart– Involuntary muscle– Has its own supply of blood through the
coronary artery system– Can tolerate interruption of blood
supply for only very short time periods– Automaticity-has the ability to contract
on its own
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Respiratory System
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Respiratory System
• Nose and mouth• Pharynx
– Oropharynx– Nasopharynx
• Epiglottis-leaf shaped structure that prevents food and liquid from entering trachea during swallowing
• Trachea (windpipe)• Cricoid cartilage-firm cartilage ring forming
the lower portion of the larynx
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Respiratory System
• Larynx (voice box)
• Bronchi-two major branches of the trachea to the lungs which subdivide into smaller passages ending in the alveoli
• Lungs
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Respiratory System
• Diaphragm– Inhalation (active)
• Diaphragm and intercostal muscles contract increasing size of the thoracic cavity
– Diaphragm moves slightly downward, ribs move upward/outward
• Air flows into lungs
– Exhalation • Diaphragm and intercostal muscles relax
decreasing the size of the thoracic cavity– Diaphragm moves upward, ribs move downward/inward
• Air flows out of the lungs
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Respiratory Physiology• Alveolar/capillary exchange
– Oxygen right air enters the alveoli during each inspiration
– Oxygen poor blood in the capillaries pass into the alveoli
– Oxygen enters the capillaries as carbon dioxide enters the alveoli
• Capillary cellular exchange– Cells give up carbon dioxide to the capillaries– Capillaries give up oxygen to the cells
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Infant and Child considerations
• Mouth and nose are smaller and more easily obstructed
• Pharynx– tongues take up proportionally more space than
adults
• Trachea– Narrower, more easily blocked– Softer and more flexible
• Diaphgram– chest wall is softer, depend more on diaphragm for
breathing
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Cardiovascular System
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Circulatory (Cardiovascular)
• Heart– Structure/function
• Atrium – Right-receives blood from the veins of the body and
heart, pumps oxygen poor blood into right ventricle– Left-receives blood from the pulmonary veins (lungs),
pumps oxygen right blood to left ventricle
• Ventricle– Right-pumps blood to lungs– Left-pumps blood to body
• Valves-prevent backflow of blood
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Cardiac Conduction System• Heart is more than a muscle
– Specialized contractile and conductive tissue in the heart
– Electrical impulses• Automaticity
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Arteries
• Carry blood away from the heart to rest of the body
• Major arteries– Coronary arteries-supply the heart with
blood– Aorta-major artery supplies other vessels
with blood, originates from the heart lying in front of the spine in the thoracic and abdominal cavities and divides at the level of the navel into the iliac arteries
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Arteries
– Pulmonary-originates at right ventricle and carries oxygen poor blood to the lungs
– Carotid-major artery of the neck, supplies head with blood, pulsations can be palpated on either side of the neck
– Femoral-major artery of the thigh, supplies groin and lower extremities with blood, pulsations can be palpated in groin area
– Radial-major artery of the lower hand, pulsations can be palpated at the wrist thumb side
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Arteries
– Brachial-an artery of upper arm, pulsations on inside of the arm between elbow and shoulder, used with determining blood pressure
– Posterior tibial-pulsations can be palpated on the posterior surface of the medial malleoulus
– Dorsalis pedis-an artery in the foot, pulsations can be palpated on the anterior surface of the foot
• Arterioles are the smallest branch of an artery leading to capillaries
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Capillaries
• Tiny blood vessels that connect arterioles to venules
• Found in all parts of the body
• Allows for the exchange of nutrients and waste at the cellular level
• Venules are the smallest branch of the veins leading to the capillaries
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Veins
• Carry blood back to the heart
• Major veins:– *Pulmonary vein-carries oxygen rich
blood from the lungs to the left atrium– Venae cavae
• Superior• Inferior• Carries oxygen poor blood back to right
atrium
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Blood composition
• Red blood cells– Give blood their color– Carry oxygen to organs– Carry carbon dioxide away from organs
• White blood cells-part of the body’s defense against infections
• Plasma-fluid that carries blood cells and nutrients
• Platelets-essential for the formation of blood clots
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Physiology
• Pulse– L ventricle contracts, sending a wave of blood through
arteries– Can be palpated anywhere an artery passes near the
skin surface and over a bone– Peripheral pulses
• Radial• Brachial• Posterior tibial• Dorsalis pedis
– Central• Carotid• Femoral
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Blood Pressure
• Systolic-the pressure exerted against the walls of the artery when the L ventricle contracts
• Diastolic-pressure exerted against the walls of the artery when L ventricle is at rest
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Inadequate circulation/shock
• Hypoperfusion resulting in profound depression of vital processes of the body
• Characterized by these signs and symptoms:– Pale, cyanotic (blue colored), cool, clammy skin– Rapid, weak pulse– Rapid, shallow breathing– Restlessness, anxiety or mental dullness– Nausea and vomiting
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Perfusion
• Defined: circulation of blood through an organ
• Perfusion is the delivery of oxygen and other nutrients to the cells of all organ systems and the removal of waste products
• Hypoperfusion is the inadequate circulation of blood through an organ
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Hypoperfusion/Shock
• Reduction in total blood volume
• Subnormal temperature
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Nervous System
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Nervous system
• Controls the voluntary and involuntary activity of the body
• Components– Central nervous system
• Brain-located within cranium• Spinal cord-located in spine from brain to lumbar
vertebrae
– Peripheral nervous system• Sensory nerves carry info from body to brain and
spinal cord• Motor nerves carry info from the brain and spinal
cord to the body
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Endocrine System
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Endocrine System
• Secretes chemicals (hormones), responsible for regulating body activities such as reproductive changes and regulation of metabolism
• Organs include the hypothalamus in the brain, pituitary gland, thyroid and parathyroid glands, adrenal glands, and parts of the pancreas
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DigestiveSystem
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Gastrointestinal System
• Responsible for the digestion of food
• Chemicals aiding in digestion produced by liver, gallbladder and parts of pancreas
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Genitourinary system
• Organs include reproductive organs and those organs responsible for the production and secretion of urine
• Located close together in abdomen and pelvis because of shared functions
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Skin
• Integumentary system
• Protects body from environment, bacteria, and other organisms
• Helps regulate body temperature
• Senses heat, cold, touch, pressure, and pain-transmits this information to brain and spinal cord
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Layers of the Skin
• Epidermis-outermost layer of skin
• Dermis-deeper layer of skin containing sweat and sebaceous glands, hair follicles, blood vessels, and nerve endings
• Subcutaneous layer
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