What are the 4 chambers of the heart?
Right atrium
Right ventricle
Left atrium
Left ventricle
Heart Fun Facts
Your Heart Will Continue to Beat for a short period even if it's Removed From Your Body
Over your lifetime, your heart will pump 1 million barrels of blood … enough to fill 2 oil super tankers
Average man's heart = 10 ounces HR = 70 beats/minute Average woman's heart = 8 ounces. HR = 78 beats/minute
Your Heart is Not on the Left Side of Your Chest
It takes about 45 seconds for blood to circulate from the heart, all around the body, and back
Heart beats 100,000 times a day, and almost one million times a week
What are the five different types of blood vessels.
Arteries
Arterioles
Veins
Venules
Capillaries
Arteries are large blood vessels that carry blood AWAY from the heart. What else is important.
Thick walls to withstand high blood pressure
Muscular layer helps control our blood pressure.
generally oxygenated blood (exception)
No valves
Arterioles are smaller branches of arteries, but also carry blood AWAY from heart. What else is important ?
Funnel blood to capillaries
Usually carry oxygenated blood & looks bright red
Found deeper within our bodies, not near the surface of our
Which parts does a artery blood vessels have?
Capillaries are the smallest blood vessels in our body. What else is important?
Diameter of a single red blood cell.
thin walls allow for diffusion of nutrients, gases, and wastes
Capillaries are spread throughout our entire body
Site of gas exchange
Large Surface Area / Low velocity
Connects vessels between arterioles and venules.
Venules are smaller branches of veins that collect blood from the body tissues and carry it to the larger vein. What else is important?
Usually carry deoxygenated blood that has just dropped off oxygen to body tissues.
Veins will look blue due to the blue colour of deoxygenated blood and can be found more superficial in our body (near the skin).
(Blue colour myth)
Veins are large blood vessels, but carry blood TOWARDS the heart. What else is important.
Under LOW pressure, far away from the heart
Because of this low pressure, veins have one-way valves to prevent backflow
Not as thick as arteries
They still have a muscular layer, but it is less thick than the arteries.
What are the four valves in our heart?
Semilunar valves
exit the heart (arteries)
pulmonary valve and aortic valve
Atrioventricular valves (AV valves)
Between atria & ventricles
Tricuspid valve(3) and Mitral valve(2)
What are the major arteries and Veins?
Subclavian (arms)
Renal (kidneys)
Femoral (leg)
Iliac (Trunk)
Coronary (Heart)
Carotid (Head Artery)
Jugular (Head vein)
What is the difference between systole and diastole?
SYSTOLE = CONTRACTION (ventricle) of cardiac muscle.
DIASTOLE = RELAXATION of cardiac muscle.
What is the lub-dupp heart rate?
1st ~ the ATRIA CONTRACT (the "lub" part) while the ventricles are relaxed.
2nd ~ The VENTRICLES CONTRACT (the "-DUPP" part) while the atria relax.
What happens during the circlatory cycle?
Both atria contract at the same time (systole) while the ventricles are relaxed (diastole).
Both atria relax (diastole) as the ventricles contract (systole).
Both the atria and ventricles are relaxed (diastole).
Repeat.
How does the heart know when to beat?
The sinoatrial (SA) node. Located at the upper end of the right atrium.
The atrioventricular (AV) node. Located at the bottom side of the right atrium.
The Purkinje fibers located in the bases of the ventricles.
Which disseas come from the wrong blood pressure?
HYPOTENSION: lower blood pressure than normal.
HYPERTENSION: higher blood pressure than normal.
Vasodilation vs Vasoconstriction explain the differences?
Vasodilation: is the widening of your blood vessels, causes an increase in blood flow
Causes a decrease in blood pressure
Drugs, alcohol, medication, exercise, inflammation, + temperature
Vasoconstriction: is the narrowing of blood vessels
Causes an increase in blood pressure
Drugs, alcohol, - temperature, eating salty snacks, loss of fluids, ANS,
What is blood made of?
Plasma (55%)
White blood cells/platelets (4%)
Red Blood Cells(41%)
pH of 7.35-7.38
What are the scientific names for the blood componets?
Erythrocytes: red blood cells (RBC’s)
Leukocytes: white blood cells (WBC’s)
Platelets: thrombocytes
What is anemia?
when blood clumbs
Last changed10 months ago