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EMT Chapter 4
The Human Body
109
Biology
Professional
10/23/2008

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Term
Normal Anotomical Position
Definition
Standing erect, facing forward with arms down at sides and palms forward.
Term
Supine Position
Definition
Patient is laying face up on his/her back.
Term
Prone Position
Definition
Patient is lying face down on his/her stomach.
Term
Lateral Recumbant Position
Definition
Patient is lying on his/her left or right side (switch sides if more than 30 minutes passes)
Term
Fowlers Position
Definition
Patient is lying on his/her back with his/her upper body elevated at a 45-60 degree angle.
Term
Trendelenburg Position
Definition
Patient is lying on his/her back with legs elevated higher than head.
Term
Midline
Definition
N.A.P. with a line going right down the middle (facing you). Divides the body into right and left planes.
Term
Midaxillary Line
Definition
Patient standing in profile... line from the middle of the armpit down to the ankle. Divides the body into the anterior plane (front) and posterior plane (back).
Term
Transverse Line
Definition
N.A.P. horizontal line through the patient's waist. Divides the body into superior plane (above) and interior plane (below).
Term
Plantar
Definition
Refers to the sole of the foot.
Term
Palmar
Definition
refers to the palm of the hand.
Term
Musculoskeletal System
Definition
a bony framework, or skeleton, held together by ligaments that connect bone to bone, layers of muscles, tendons that connect muscles to bones, and various other connective tissues.
Term
Three functions of the skeletal system
Definition
1)Gives the body its shape
2)Protects the vital internal organs
3)Allows for movement
Term
Six components of the skeletal system
Definition
1)Skull
2)Spinal Column
3)Thorax
4)Pelvis
5)Upper Extremities
6)Lower Extremities
Term
Skull
Definition
Rests at the top of the spinal column and houses and protects the brain.
Term
Two parts of the skull
Definition
1)Cranium
2)Face
Term
Cranium
Definition
forms the top, back, and sides of the skull plus the forehead.
Term
Face
Definition
area between the brow and chin. Has 14 bones, 13 of which are immovable and interlocking.
Term
Orbits
Definition
Eye sockets
Term
maxillae
Definition
fused bones of the upper jaw
Term
zygomatic bones
Definition
cheek bones
Term
Mandible
Definition
Lower jaw. Moves freely on hinge joints. Largest and strongest bone in the face.
Term
Spinal Column
Definition
The principal support system of the body. Directly or indirectly attached to the entire human skeleton. Made up of 33 irregularly shaped blocks of bone called vertebrea.
Term
The five parts of the spinal column
Definition
1. Cervical
2. Thoracic
3. Lumbar
4. Sacral
5. Coccyx
Term
Cervical spine
Definition
The first seven vertebrae. Most prone to injury.
Term
Thoracic Spine
Definition
12 vertebrae directly inferior to the cervical spine. The upper back. 12 pairs of thoracic ribs are attached.
Term
Lumbar Spine
Definition
12 vertebrae that form the lower back. Least mobile of the vertebrae.
Term
Sacral Spine
Definition
The next 5 vertebrae below the Lumbar spine. Form the posterior side of the pelvis.
Term
Coccyx
Definition
Tailbone. Made up of the last 4 vertebrae.
Term
Thorax
Definition
The chest between the base of the neck and the diaphram. Composed of the ribs, the sternum (breastbone) and the thoracic spine.
Term
Clavicle
Definition
collarbone. Attached to the superior portion of the sternum (manubrium).
Term
Xiphiod Process
Definition
The inferior portion of the sternum.
Term
The Pelvis
Definition
The bones that form the floor of the abdominal cavity. The sacrum and the coccyx of the spine, the iliac crests, the pubis, and the ischium.
Term
Lower Extremities
Definition
Legs from the hip to the tows.
Term
Acetabulum
Definition
the joint made up of the pelvic socketis where the femur fits.
Term
Patella
Definition
Protects the knee joint
Term
Tibia
Definition
weight bearing bone located at the anterior and medial side of the leg.
Term
Fibula
Definition
attached to the tibia at the top and is located at the lateral side of the leg parallel to the tibia.
Term
Upper Extremities
Definition
shoulders, arms, forearms, wrists, and hands.
Term
Scapula
Definition
shoulder blade
Term
Acromion
Definition
the lateral triangular protection of the scapula that forms the point of the shoulder.
Term
Humerus
Definition
The largest bone in the upper extremity, located in the proximal portion of the upper arm.
Term
Radius
Definition
the lateral bone of the forearm
Term
Ulna
Definition
the medial bone of the forearm.
Term
Olecranon
Definition
Term
Carpals
Definition
The 8 bones of the wrist.
Term
Metacarpals
Definition
The bones of the hand.
Term
Phalanges
Definition
the bones of the fingers and the thumbs.
Term
Ball and Socket Joint
Definition
Permits the widest range of motion-flexion, extension, abduction, adduction, and rotation (Shoulder and hip).
Term
Hinged Joint
Definition
permits flexion and extension.
Term
Pivot Joint
Definition
allows for a turning motion and includes joints between the head and neck and in the wrist.
Term
Gliding Joint
Definition
Bone slides across another to the point where surrounding structures restrict the motion.
Term
Saddle Joint
Definition
Shaped to permit combinations of limited movements along perpendicular planes. EX: Ankle allows the foot to slightly turn inward as it moves up and down.
Term
Condyloid Joint
Definition
A modified ball and socket joint that permits limited motion in two directions. EX: Wrist
Term
The Three Types of Muscles
Definition
1.Voluntary
2.Involuntary
3.Cardiac
Term
Voluntary Muscle
Definition
Can be contracted and relaxed by the will of the individual. Often referred to as skeletal muscles. Generally attached at the one or both ends to a bone.
Term
Involuntary Muscle
Definition
Also called "smooth muscle" is made up of large fibers that carry out the automatic muscular functions of the body. Individual has no direct control over these muscles.
Term
Cardiac Muscle
Definition
A special kind of involuntary muscle particularly suited for the work of the heart. Has its own blood supply.
Term
Respiratory System
Definition
The organs involved in the exchange of gases between an organism and the atmosphere.
Term
The 7 Major components of the respiratory system.
Definition
1. The nose and mouth
2. The pharynx
3. The Epiglottis
4. The Trachea and Larynx
5. The Bronchi
6. The Lungs
7. The Diaphragm
Term
Pharynx
Definition
Throat. The oral portion is the oropharynx and the nasal portion is called the nasopharynx.
Term
The Epiglottis
Definition
A small leaf-shaped flap that covers the entrance of the larynx during swallowing.
Term
The Trachea & Larynx
Definition
The trachea carries air from the nose and mouth to the lungs. The larynx houses the vocal cords.
Term
The Bronchi
Definition
two tubes that branch of from the distal portion of the trachea and connect to each lung.
Term
Bronchioles
Definition
Subdivisions or branches from each bronchus that connect to thousands of alveoli.
Term
Lungs
Definition
principal organs of respiration.
Term
Diaphragm
Definition
A powerful dome-shaped muscle essential to respiration that also separates the thoracic cavity from the abdominal cavity.
Term
Normal respiratory rate for adults.
Definition
12 to 20 breaths per minute.
Term
Normal respiratory rate for children
Definition
15-30 breaths per minute.
Term
Normal respiratory rate for infants.
Definition
25-50 breaths per minute.
Term
Circulatory System
Definition
the body system that transports blood to all parts of the body. Includes the heart, blood vessels, and blood.
Term
Heart
Definition
Muscular organ that contracts to force blood into circulation through the body. Located within the chest in the thoracic cavity between the two lungs.
Term
Pericardium
Definition
a double-walled sac that encloses the heart, gives support, and prevents friction as the heart moves within this protective sac.
Term
Atria
Definition
the upper chambers of the heart that receive blood from the veins. The right atria receives oxygen depleted blood from the veins of the body. The left atria receives oxygen rich blood from the pulmonary veins of the lungs.
Term
Ventricles
Definition
The lower chambers of the heart that pump blood out to the arteries. The right ventricle pumps oxygen depleted blood to the pulmonary arteries and eventually to the lungs where they are oxygenated. The left ventricle pumps oxygen rich blood to the aorta, gradually delivering it to all body cells.
Term
The four valves of the heart
Definition
1. Tricuspid valve: between the right atrium and the right ventricle.
2. Pulmonary valve: at the base of the pulmonary artery in the right ventricle.
3. Mitral valve: (bicuspid valve) between the left atrium and the left ventricle.
4. Aortic valve: at the base of the aortic artery in the left ventricle.

The purpose of the valves, is to keep blood flowing in one direction and prevent backflow.
Term
Arteries
Definition
carry blood away from the heart.
Term
Aorta
Definition
The major artery from the heart. Lieas in front of the spine and passes through the thoracic and abdominal cavities. At about the naval, the aorta divides into the iliac arteries which carry blood down each leg. The aorta and its branches supply all other arteries with blood.
Term
Coronary Arteries
Definition
vessels that supply the heart with blood.
Term
Carotid Arteries
Definition
one on each side of the neck, supply the brain and head with blood.
Term
Femoral Arteries
Definition
the major artery of the thigh and supplies the groin and leg with blood. Pulsations can be felt in the groin and at the crease between the abdomen and thigh.
Term
Dorsalis Pedis Arteries
Definition
an artery in the foot. Pulsations can be found on the top surface of the foot on the big toe side.
Term
Posterior Tibial Arteries
Definition
the posterior tibial artery travels from the calf to the foot. Pulsations can be felt posterior to the medial malleolus (ankle bone).
Term
Brachial Arteries
Definition
the major artery of the upper arm. Used when determining blood pressure.
Term
Radial Arteries
Definition
major artery of the arm distal to the elbow joint. Pulsations can be felt proximal to the thumb on the wrist. Usually assessed when taking a patient's pulse.
Term
Pulmonary Arteries
Definition
arteries that originate in the right ventricle of the heart, carry oxygen-depleted blood to the lungs, where blood is oxygenated and returned to the heart for circulation throughout the body (the ONLY arteries that carry deoxygenated or oxygen depleted blood).
Term
Arterioles
Definition
carry blood from the arteries to the capillaries.
Term
Capillaries
Definition
tiny blood vessel that connects an arteriole to a venule. Has walls that allow for the exchange of gases, nutrients and waste at the cellular level. All fluid, oxygen and carbon dioxide exchange takes place between the blood and tissue cells through the walls of the capillaries in all parts of the body.
Term
Venules
Definition
the smallest branches of the veins are connected to the distal ends of the capillaries. Oxygen depleted blood flows here from the capillaries and transported to larger veins.
Term
Veins
Definition
carries blood back to the heart. All veins except the pulmonary veins carry oxygen-depleted blood. Major veins include the venae cavae and the pulmonary veins.
Term
Venae Cavae
Definition
veins that carry oxygen-depleted blood back to the right atrium where it begins circulation through the heart and lungs. Superior and inferior are located at the top and bottom of the right atrium and determine whether the blood comes from the upper or lower body.
Term
Pulmonary Veins
Definition
veins that carry oxygen rich blood from the lungs to the left atrium. The only veins that carry oxygenated blood.
Term
The composition of blood
Definition
Blood is composed of red blood cells, white blood cells, platelets, and plasma.
Term
Red Blood Cells
Definition
blood cells that carry oxygen to the body cells and carry carbon dioxide away from the cells.
Term
White Blood Cells
Definition
blood cells that are part of the body's immune system and help defend against infection.
Term
Platelets
Definition
essential to the forming of blood clots. Necessary to stop bleeding.
Term
Plasma
Definition
This is the liquid part of the blood, which carries blood cells and transports nutrients to all tissues. Also transports waste products to organs where they can be excreted from the body.
Term
Pulse
Definition
the wave of blood propelled through the arteries as the result of the contraction of the left atrium of the heart.
Term
Blood Pressure
Definition
the force exerted by the blood on the interior walls of the blood vessels.
Term
Systolic Blood Pressure
Definition
the pressure exerted against the walls of the arteries when the left ventricle contracts.
Term
Diastolic Blood pressure
Definition
the pressure exerted against the walls of the arteries when the left ventricle is at rest or in between contractions.
Term
Perfusion
Definition
the delivery of oxygen and other nutrients to the cells of all organ systems and elimination of carbon dioxide and other waste products, which results from the constant adequate circulation of blood through the capillaries.
Term
Hypoperfusion
Definition
the insufficient supply of oxygen and other nutrients to some of the body's cells and the inadequate elimination of carbon dioxide and other wastes that result from inadequate circulation of blood.
Term
The Nervous System
Definition
Controls the voluntary and involuntary activity of the human body. Includes the brain, spinal cord, and nerves.
Term
The two main structures of the nervous system.
Definition
1. central nervous system.
2. peripheral nervous system.
Term
The Cerebrum
Definition
the outermost portion of the brain. Occupies nearly all the cranial cavity. Controls specific body functions such as sensation, thought, and associative memory. Initiates and manages motions that are under the conscious control of the the individual.
Term
The Cerebellum
Definition
AKA the "small brain", located in the posterior and inferior aspect of the cranium. Coordinates muscle activity and maintains balance through impulses from the eyes and the ears. Holds muscles in a state of partial contraction.
Term
Brain Stem
Definition
Contains the mesencephalon, the pons, and the madula oblongata.
Term
Peripheral Nervous System
Definition
Composed of nerves located outside the spinal cord and brain. Carries sensory information from the body to the spinal cord and brain. Carries motor information from the brain and spinal cord to the body.
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