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Emergency Medical Responder > Ch 04: Anatomy and Physiology > Flashcards

Ch 04: Anatomy and Physiology Flashcards

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Royal College: Emergency Medicine flashcards USMLE® Step 1 flashcards
1
Q

Body System

A

Organs and structures that carry out specific functions

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2
Q

Cell

A

The basic unit to all tissue

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3
Q

Tissue

A

Cells grouped together to perform a task

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4
Q

Organ

A

Tissue grouped together to perform a task

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5
Q

Vital Organs

A

Organs essential for life

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6
Q

Midline

A

An invisible line separating the right and left halves of the body.

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7
Q

Lateral

A

Away from the midline horizontally

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8
Q

Medial

A

Toward the midline horizontally

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9
Q

Anterior - Ventral

A

Toward the front of the body

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10
Q

Posterior - Dorsal

A

Toward the back of the body

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11
Q

Superior - Cephalic

A

Toward the head on the body

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12
Q

Inferior - Caudal

A

Toward the Feet

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13
Q

Proximal

A

Injuries to the extremities that are closer to the trunk of the body

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14
Q

Distal

A

Injuries to the extremities that are away from the trunk of the body

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15
Q

The Body’s Four Quadrants

A

Upper Right
Upper Left
Lower Right
Lower Left

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16
Q

Name the Five Body Cavities

A 
Cranial
Spinal
Thoracic
Abdominal
Pelvic
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17
Q

Cranial Cavity

A

Located in the head and protected by the skull. Holds the brain.

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18
Q

Spinal Cavity

A

Extended from the bottom of the skull to the lower back. Protected by the vertebrae.
Contains the Spinal Cord.

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19
Q

Thoracic Cavity

A

Chest Cavity; located in the trunk between the diaphragm and neck and is protected by the rib cage. Contains Heart and Lungs

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20
Q

Abdominal Cavity

A

Located in the trunk between the diaphragm and pelvis. Holds the Liver, Spleen, Stomach, Pancreas, Gallbladder, Kidneys, Large Intestine and Small Intestine.

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21
Q

Pelvic Cavity

A

Located in the Pelvis, the lowest part of the trunk. Protected by the pelvic bones and lower portion of the spine. Contains the reproductive organs and colon.

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22
Q

Name the Body Systems

A 
Respiratory
Circulatory
Nervous
Musculoskeletal
Integumentary
Endocrine
Digestive
Genitourinary
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23
Q

Respiratory System - Parts

A 
Nose
Mouth
Lungs
Nasopharynx
Oropharynx
Epiglottis
Trachea
Pharynx
Larynx
Bronchi
Alveoli
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24
Q

Nasopharynx

A

The part of the pharynx behind and above the soft palate, directly continuous with the nasal passages.

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25
Q

Oropharynx

A

The part of the pharynx between the soft palate of the mouth and the upper edge of the epiglottis before the esophagus.

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26
Q

Epiglottis

A

A thin, valvelike, cartilaginous structure that covers the glottis during swallowing, preventing the entrance of food and drink into the larynx.

The flap of tissue that covers the trachea to keep food and liquid out of the lungs.

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27
Q

Trachea

A

The tube from the Larynx to the Bronchi that enables air passage; The wind pipe.

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28
Q

Pharynx

A

The tube that connects the mouth and nasal passages with the esophagus.

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29
Q

Larynx

A

A part of the airway connecting the pharynx with the trachea; The ‘voice box’.

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30
Q

Bronchi

A

The air passages that lead from the trachea to the lungs in a Y shape.

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31
Q

Alveoli

A

Small air sacs in the lungs where gases and waste are exchanged between the lungs and the blood.

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32
Q

Diaphragm

A

A band of muscle dividing the thoracic and abdominal cavities; responsible for enabling the breathing process.

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33
Q

Respiratory System Primary Function

A

Supply the body with Oxygen.

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34
Q

The Breathing Process

A

The diaphragm contracts, creating a negative space in the lungs, drawing in air through the nose and mouth. Air passes through the pharynx, passed the epiglottis into the trachea, down to the bronchi and into the alveoli where gas exchange occurs with capillaries. When the diaphragm relaxes, it forces carbon dioxide in the opposing direction.

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35
Q

Respiratory Emergencies

A 
Choking
Illness (Epiglotitis, Pneumonia)
Conditions such as asthma and Emphysema
Electrocution
Shock
Drowning
Heart attack or Heart Disease
Injury to the chest and lungs
Allergic Reactions (anaphylaxis)
Drugs
Poisoning
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36
Q

The Minutes After Respiratory Arrest

A

0 minutes - Clinical Death: Breathing stops, heart will soon stop

4-6 Minutes: Brain damage possible

6-10 Minutes: Brain damage likely

10+ Minutes - Biological Death: irreversible brain damage certain

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37
Q

Circulatory System

A

Transports nutrients and oxygen to body cells and removed waste products from the blood.

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38
Q

Circulatory System Components

A 
Heart
Right Atrium
Right Ventricle
Left Atrium
Left Ventricle
Aorta
Superior Vena Cava
Inferior Vena Cava
SA Node
AV Node
Veins
Arteries
Capillaries
Pulmonary Veins
Pulmonary Arteries
Blood
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39
Q

Contraction

A

The pumping action of the heart, controlled by the hearts electrical system.

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40
Q

Heart

A

A fist sized muscular vital organ that is responsible for moving blood throughout the entire body

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41
Q

Right Atrium

A

(Anatomic) upper right chamber of the heart. De-oxygenated blood enters through here from the inferior vena cava and passes to the right ventricle.

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42
Q

Right Ventricle

A

(Anatomic) lower right chamber of the heart. De-oxygenated blood enters from the right atrium and gets pumped to the lungs.

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43
Q

Left Atrium

A

Anatomic) left upper chamber of the heart. Newly Oxygenated blood enters and then gets pumped to the left ventricle.

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44
Q

Left Ventricle

A

(Anatomic) lower left chamber of the heart where oxygenated blood enters from the left atrium and is forcefully pumped out of the aorta to the rest of the body.

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45
Q

Aorta

A

Main trunk of the arterial system that feeds the entire system of arteries, blood vessels and capillaries with oxygenated blood.

46
Q

Arteries

A

A blood vessel that carries blood from the heart.

47
Q

Pulmonary Artery

A

Carries de-oxygenated blood from the heart to the lungs

48
Q

Pulmonary Vein

A

Carries oxygenated blood from the lungs to the heart.

49
Q

Capillaries

A

Tiny blood vessels linking arteries and veins, transfer oxygen and nutrients to the cells and remove waste products.

50
Q

Veins

A

Carry blood to the heart.

51
Q

Sinoatrial Node (SA Node)

A

The point of origin of the heart’s electrical impulse; Pacemaker of the heart and generates normal sinus rhythm.

52
Q

Atrioventricular Node (AV Node)

A

Part of the electrical control system of the heart that coordinates the top of the heart. It electrically connects atrial and ventricular chambers.

53
Q

Blood

A

The fluid that circulates in the circulatory system

54
Q

The Heart’s Electrical System

A

Begins with the Sinoatrial Node located in the upper part of the hearts right atrium. The current then passes to the Atrioventricular Node where it is delayed, allowing time for the blood in the atria to fill their respective ventricles. It then passes through the bundles of His, back up to the Purkinje fibres, leading to the contraction of the ventricles.

55
Q

Pathway of Blood Through the Heart

A

Begins at the Superior and Inferior Vena Cava. De-oxygenated blood is brought to the right atrium, where by electrical signals is pumped to the right ventricle, up through the pulmonary Artery where it goes to the lungs to be oxygenated. Then it gets pumped through the pulmonary vein to the left atrium, down to the left ventricle, forced up through the Aorta and pumped to the rest of the body.

56
Q

Electrocardiogram (ECG)

A

A reading of the conduction of the electrical current through the heart’s pathways.

57
Q

Clinical Death

A

The condition in which the heart stops beating and breathing stops.

58
Q

Biological Death

A

The irreversible damage caused by the death of brain cells.

59
Q

Normal Sinus Rhythm

A

The normal conduction of electrical impulses without any disturbances.

60
Q

Superior Vena Cava

A

Short vein that carries de-oxygenated blood from the upper part of the body to the right atrium

61
Q

Inferior Vena Cava

A

Large vein that carries de-oxygenated blood from the lower part of the body to the right atrium.

62
Q

Nervous System

A

Transmits messages to and from the brain

63
Q

Nervous System Components

A

Brain
Spinal Cord
Nerves

64
Q

Brain

A

Control center of the nervous system. Brain cells do not regenerate.

65
Q

Nerves

A

Paths that brain signals travel. Regenerate extremely slowly, to the point where it is believed that they do not regenerate at all.

66
Q

Spinal Cord

A

Large bundle of nerves in the spine, nerves extend from this to every part of the body

67
Q

Spinal Column

A

The series of vertebrae extending from the base of the spine to the tip of the tailbone.

68
Q

Regions of the Spine

A 
Cervical - 7 vertebrae
Thoracic - 12 vertebrae
Lumbar - 5 vertebrae
Sacrum - 5 vertebrae
Coccyx - 4 fused bones
69
Q

Vertebrae

A

The 33 bones of the spinal column separated by cushions of cartilage.

70
Q

Why do we take serious precautions with spinal/head injuries?

A

Because the Spinal Cord is located between wing shaped bone structure of the vertebrae, and can easily be damaged, leaving the patient paralyzed.

71
Q

Musculoskeletal System

A

Provides framework, protects organs, allows movements and provides heat and blood components.

72
Q

Muskuloskeletal System Components

A 
Bones
Muscles
Ligaments
Tendons
Cartilage
73
Q

Bones

A

The tissue responsible for supporting and protecting various organs in the body. Also produce red (Erythrocytes) and white (Leukocytes) blood cells.

74
Q

Muscles

A

Function to provide force and motion. Primarily responsible for maintaining and changing posture, locomotion, as well as movement of internal organs, such as the contraction of the heart and the movement of food through the digestive system via peristalsis.

75
Q

Ligaments

A

Connect bone to bone.

76
Q

Tendons

A

Connect muscle to bone.

77
Q

Cartilage

A

Flexible connective tissue that also functions as shock absorbers and structure for various parts of the body.

78
Q

Basic Bones of the Body

A 
Cranium
Clavical
Scapula
Ribs
Sternum
Vertebrae
Pelvis
Femur
Patella
Tibia
Fibula
Metatarsal 
Phalanges
Humerus
Radius
Ulna
Metacarpal
79
Q

Joint

A

A structure where two or more bones come together. Held by ligaments.

80
Q

Osteoporosis

A

When bones become gradually and progressively weaker and less dense.

81
Q

Major Muscles of the Body

A 
Face Muscles
Neck Muscles
Deltoid
Bicep
Tricep
Extensors
Chest muscles
Abdominal muscles
Groin muscles
Back muscles
Gluteus Maximus
Quadriceps
Hamstrings
Calf Muscles
Archilles Tendon
82
Q

Voluntary Muscle

A

Skeletal muscles that act under your conscious control. They also protect underlying structures such as bones, nerves and blood vessels.

83
Q

Involuntary Muscle

A

Muscles automatically controlled by the brain. Ie: Heart and diaphragm.

84
Q

Paralysis

A

Complete loss of muscle control, may also affect nerves and the ability to sense touch.

85
Q

Osteoarthritis

A

Inflammation of the joints

86
Q

Integumentary System

A

Protects the body by preventing infection and dehydration, assists in temperature regulation and production of certain vitamins.

87
Q

Integumentary System Components

A

Skin
Hair
Nails

88
Q

Layers of Skin

A

Epidermis
Dermis
Fat (Hypodermis)

89
Q

Epidermis

A

First layer of skin; Provides a barrier from bacteria.

90
Q

Dermis

A

The deeper layer of skin; Contains important structures like sweat and oil glands, and blood vessels.

91
Q

Subcutaneous Layer (Hypodermis)

A

Attaches skin to muscle and adds a layer of fat to insulate the body. Contains 50% of the body’s fat cells.

92
Q

Sweat Glands and Pores

A

Help regulate body tempurature by releasing sweat.

93
Q

Oil Glands

A

Keep the skin soft, supple and waterproof.

94
Q

Endocrine System

A

Secretes hormones and other substances into the blood to regulate certain body functions.

95
Q

Endocrine System Components

A 
Pineal Gland
Hypothalamus
Pituitary Gland
Thyroid
Adrenals
Ovaries / Testes
96
Q

Glands

A

Organs that release hormones and other substances into the blood or onto the skin to regulate some bodily functions.

97
Q

Gastrointestinal System

A

Breaks down food into energy and removes solid waste products.

98
Q

Gastrointestinal System Components

A 
Mouth
Esophagus
Stomach
Liver
Pancreas
Gallbladder
Small Intestine
Large Intestine (Colon)
Rectum
Anus
99
Q

Hydrochloric Acid

A

The corrosive acid in the stomach used for digestion.

100
Q

Peristalsis

A

The muscle movements that pushes food (Bolus) through the digestive tract.

101
Q

Pancreas

A

Both an endocrine gland producing several important hormones and a digestive organ, secreting pancreatic juice containing digestive enzymes that assist the absorption of nutrients and the digestion in the small intestine.

102
Q

Liver

A

Produces bile, which is used in digestion. Has a lot of other useful functions as a gland.

103
Q

Gallbladder

A

A small organ where bile is stored, before it is released into the small intestine.

104
Q

Small Intestine

A

Where much of the digestion and absorption of food takes place.

105
Q

Large Intestine

A

Absorbs water from the remaining indigestible food matter, and then passes useless waste material from the body.

106
Q

Rectum

A

Acts as a temporary storage site for feces.

107
Q

Anus

A

An opening at the end of the digestive tract.

108
Q

Genitourinary System

A

Two systems: Urinary and Reproductive.

Filters waste product from the bloodstream and enables sexual reproduction.

109
Q

Genitourinary System Basic Components

A

Kidneys
Urinary Bladder

Penis / Vagina and Uterus
Testes / Ovaries

110
Q

Kidneys

A

They serve the body as a natural filter of the blood, and remove wastes, which are diverted to the urinary bladder.

Can be easily damaged during back trauma, causing a patient to lose a lot of blood.

111
Q

Bladder

A

collects urine excreted by the kidneys before disposal by urination. Can be ruptured with trauma.

112
Q

External Reproductive Organs

A

Genitalia; trauma can cause heavy bleeding but is rarely life threatening. Injuries to this area may be a result of sexual assault.

Emergency Medical Responder (16 decks)

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