1. REVIEW: LABELED HEART DIAGRAM
aorta
pulmonary artery
left atrium
left ventricle
septum
superior vena cava
right atrium
inferior vena cava
right ventricle
tricuspid valve
pulmonary valve
mitral valve
aortic valve
REVIEW: LABELED HEART DIAGRAM
Complete labeling of heart from Feb 7
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2. The Heart Beat Systole - Heart is pumping blood, contracting muscle
atria to the ventricles
ventricles to body or lungs
Diastole – Heart is relaxing
atria fill with blood
Review the Heart Beat before going into blood flow
How can the heart be monitored for normal activity?
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3. The EKG (or ECG) Electrocardiogram
Measures the electricity passing through the heart at a given time
Can be used to diagnose heart conditions
Each section of the EKG shows a specific event happening to the heart.
Finish with how to measure heart function
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4. The EKG Tracing P wave = atrial contraction
tracings
P wave = atrial contraction
QRS peak = ventricle contraction
T wave = resetting of the heart
systole
diastole
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5. Circulation Through the Heart
Review blood flow paths in heart and have students trace with pencils.
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6. TWO CIRCULATORY PATHWAYS
Capillaries of head and arms
Superior vena cava
Pulmonary artery
Aorta
PULMONARY CIRCULATION
Pulmonary
vein
Capillaries of right lung
Capillaries of left lung
Move to full loops from heart
SYSTEMIC CIRCULATION
Inferior vena cava
Capillaries of abdominal organs and legs
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7. Blood Vessels
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8. Structure of Blood Vessels
Artery
Vein
Capillary
Connective tissue
Smooth muscle
Endothelium
Valve
Venule
Arteriole
Structural layers, differences
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9. Cross Section Through Blood Vessels
Cross sections
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10. Arteries carry oxygen-rich blood away from the heart to the body's tissues. Arteries carry large quantities of blood that is under high pressure from the beating of the heart, they are wide and thick.
Capillaries are very narrow -- only one cell wide. They have very thin walls made of overlapping flat cells called endothelium; the walls are thin so that oxygen and carbon dioxide can pass through them easily.
Veins take oxygen-poor blood back to the heart. From the capillaries, the de-oxygenated, waste-laden blood passes into the veins for its return trip to the heart. Veins contain one-way valves to keep the blood flowing toward the heart.
Functions reiterated
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11. Blood Pressure (BP) What is it?
The force of the blood against the walls of the arteries
What does a blood pressure reading mean?
Blood pressure is recorded as two numbers, written as a ratio. For example,
120/80 mm Hg
Top number is SYSTOLIC BP, pressure in arteries when the heart contracts.
Bottom number is DIASTOLIC BP, pressure in arteries when heart rests
Describe BP
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12. Blood Pressure versus Heart Rate
Heart Rate is the number of times your heart beats per minute; your PULSE.
There is no good connection between heart rate and blood pressure.
For cardiovascular health, KNOW YOUR BP!
Emphasize differences
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