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40 Cards in this Set

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Blood
is a type of connective tissue made up of cells and liquid
Heart
multi-chambered muscular organ
Capillaries
microscopic blood vessels that carry blood between an artery and a vein allowing the exchange of substances between the blood and the interstitial fluid
Arteries
a system of thick walled blood vessels that carry blood away from the heart to other parts of the body
Veins
blood is returned from the capillaries to the heart through vessels called veins
Lymph
a collective fluid – a fluid that is similar to the interstitial fluid that circulates in the lymphatic system
Pulmonary circuit
carries oxygen-depleted blood from the heart to the lungs and the oxygen rich blood back to the heart
Systemic circuit
carries oxygen rich blood from the heart to the rest of the body and oxygen depleted blood back to the heart
Aorta
the artery that supplies oxygen rich blood to all of the body
Atria
the two upper chambers, which receive, blood returning to the heart
Ventricles
two lower chambers, which pump blood out of the heart
Valves
flaps of tissue in the heart which prevent blood from flowing backwards –located between the atria and the ventricles, and also between the ventricles and the arteries leading from the heart
Pacemaker
a specific region of your heart muscle that sets the rate at which your heart contracts –located in the wall of the right atrium –generates electrical impulses that spread rapidly over the wall of both atria making them contract
AV node
a region of the heart that impulses are sent to
Systolic pressure
the highest recorded pressure in an artery when ventricles contract (top number)
Diastolic Pressure
(second number) the lowest recorded pressure in an artery during the relaxation phase of the heart beat
Plasma
55% of blood is plasma; liquid portion of the blood made up of water, dissolved salts, proteins and other substances
Red blood cells
carries oxygen from the lungs to all the tissues of the body-remaining 45% of blood volume consists of mostly red blood cells
Hemoglobin
a protein that temporarily stores oxygen for delivery to the cells – good transporter of oxygen because it contains iron
White blood cells
also called leukocytes –have nuclei and mitochondria and are responsible for fighting infection and preventing cancer
Platelets
the clotting process depends on small fragments of blood cells – originates in the bone marrow
Plaque
cholesterol, calcium and fat deposits
Cardiovascular disease
illness of the heart and/or blood vessels
Arteriosclerosis
narrowing of arteries that result from plaque build up inside the artery wall.
Heart attack
a blood clot could close up the artery leading to a heart attack
Arteriosclerosis
more advanced stage of plaque build up that occurs when the deposits on the artery wall harden
Hypertension
high blood pressure
Stroke
a blood clot that forms in the artery going to the brain that damages brain tissue resulting from the blocked blood flow
Pharynx
throat –passageways for air and food
Epiglottis
flap of tissue-which prevents food and water from entering-momentarily covers the air pathway
Larynx
voice box that vibrates as you exhale which in turn produces sound
Trachea
windpipe
Bronchi
air tubes that connect the trachea to the lungs
Lungs
consists of sponge-like tissue each about the size of a football; function in the exchange of oxygen and carbon dioxide with the blood
Bronchioles
thin tube that branches form a bronchus within a lung
Alveoli
each bronchiole ends in a grape like clusters of tiny air sacs
Diaphragm
a sheet of muscle, which forms the bottom wall of the chest cavity and plays a key role in breathing
Emphysema
smoking related disease –causes the walls of the alveoli to lose their elasticity –this results in air becoming trapped in the alveoli during exhalation.
Pacemaker
sets the rate at which your heart contracts – located in the wall of the right atrium –generates electrical impulses that spread rapidly over the atria making them contract –impulses spread to the AV node –then spread to the ventricles causing them to contract –ventricles propel blood to the rest of the body. During diastole atria and ventricles are relaxed allowing blood from veins to enter the heart. Systole is the contraction phase where the atria contract and blood is forced into the ventricles which are relaxed –then the ventricles contract –pumping blood into arteries –while the atria are relaxed –cycle repeats every second when you are resting.
Three Main components of the circulatory system
1. Blood
2. Heart
3. Blood Vessels= blood flows through blood vessels, tubes that form a closed pipeline line within the body.