What is this about?

Trivia QuestionWhat is the strongest muscle in

the body?

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Answer

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Blood FlowHeartLungsArteriesVeinsCapillariesPulmonary Circulation

Heart

Location of heart….

HeartPurpose: To pump oxygenated blood out to the body so that the body can carry out its daily functions and work properly.

Four Chambers of the HeartUpper Two Chambers: Left and right

atriums

Lower Two Chambers: Left and right ventricles

Draw picture of the four squares….

Lungs

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Healthy Lungs

Lungs of a SmokerOn left,Emphysema

On right,Lung Cancer

Healthy Lungs vs. Smokers

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LungsPurpose: Takes in non-oxygenated blood and oxygenates that blood. It then sends that oxygenated blood back to the heart to be pumped out to the body for use.

Arteries

Blood Pressure…. High and Low (Dehydration, severe bleeding etc.)

ArteriesArteries = “Away”Arteries: blood vessels that carry blood away from the heart.

Veins

VeinsVeins = “Towards you”Veins: blood vessels that carry blood from the body back to the heart.

CapillariesTiny blood vessels that carry blood from the arteries to the body’s cells and from cells to the veins.

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Pulmonary ArteriesCarry blood containing carbon dioxide (non-oxygenated blood) from your heart to your lungs.

Pulmonary VeinsCarry blood containing oxygenated blood from your lungs to your heart.

Pulmonary CirculationDefinition: the flow of blood from the heart to the lungs and back to the heart.

(Whiteboard Drawing of stickman, lungs and heart)

Flow of Blood Through HeartBlood flows to the heart through the Superior and Inferior Vena Cava, into the RIGHT ATRIUM, thendrops into the RIGHT VENTRICLE. Blood is then pumped to the lungs through the PULMONARY ARTERY. From the lungs, the blood returns to the heart throughthe PULMONARY VEIN. Blood flows into the LEFT ATRIUM, thendrops down to the LEFT VENTRICLE. From the left ventricle the blood is pumped

to the body through the AORTA.

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ValvesA tissue that prevents the back flow of blood

into the heartThey open and close tolet the blood flow in only one direction.

**** Think of them like a traffic cop….

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Liver and KidneysWastes from your bloodare carried to these for removal from your body.

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Trivia Question

How far would all your blood vessels stretched

out be?(Arteries, veins, and capillaries)

Answer:100,000 miles!!!

That’s enough to circle the Earth four times!!

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Trivia Question

How many times does your blood cycle through your

own body in one day?

Answer

*1,000 cycles in one day!!*Roughly 100,000 heartbeats in one day.

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Diseases/DisordersHypertension: Blood pressurehigher than normal for a long time

Can lead to a heart attack, stroke, and kidney failure.

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Diseases/DisordersHeart Attack: Stoppage of flow of blood to

the heart.

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Diseases/DisordersStroke: Cluster of bloodcells (blood clot) blocks blood vessel in brain.

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Diseases/DisordersDiabetes: The body does not produce enough

insulin that allows glucose (food broken down) into the cells. So, even though the blood has plenty of glucose, the cells are not getting it for their essential energy and growth requirements because of the lack of insulin.Insulin helps with glucose transport (getting

energy out to the body)

DiabetesType I: a disorder in which the body does not produce

insulin (a hormone that aids in moving sugar from the blood to the cells). Those with Type I Diabetes are required to take insulin injections to move sugar from the bloodstream. (Usually you are born with Type I).

Type II: occurs when insulin that the body produces is less efficient at moving sugar out of the bloodstream. Usually caused from obesity. Those with Type II treat with exercise, eating healthier, weight loss.

Diabetes (cont’d)When glucose builds up in the bloodstream, it can cause two problems:in the short term, cells become starved for energy because they do not have access to the glucose in the long term, frequent glucose build-up increases theacidity of the blood, damaging many of the body's organs, including the eyes, kidneys, nerves and/or heart

Trivia Question

What is the #1 cause of death in America?

Diseases/DisordersCardiovascular Disease: The build up of

plaque in the arteries that causes a stop of blood flow resulting in a stroke or heart attack.

THE #1 cause of death in America.Primary cause of cardiovascular disease = Not

exercising enough!!! What can you argue is the most important class

of your life???….

Blood PressureDiastolic

Systolic

Normal BP is 115/75 (Systolic/Diastolic)

Diastolic Pressure Minimum pressure in arteries; occurs at the beginning of the cardiac cycle when the ventricles are relaxing (filling up with blood).

Systolic PressurePeak pressure in the arteries; occurs near the end of the cardiac cycle when the ventricles are contracting

Questions?