1. Heart

2. A large muscle which pumps blood throughout the body

3. 1. Chambers- 4 A. Upper: right and left atria Right-receives de-oxygenated blood from body Left- receives oxygenated blood from lungs

4. B. Lower: Right and Left Ventricle Right-pumps blood into lungs Left- pumps blood to the body

5. 2. Valves- 4 A. Diastole: Relaxes 1. tricuspid valve-regulates blood flow between Right Atrium (RA) and Right Ventricle (RV) 2. Mitral Valve- lets Oxygen rich blood from your lungs pass from LA to LV

7. B. Systole: Contraction 1. Pulmonary valve - Controls blood flow from rv into pulmonary arteries go to lungs for O 2 2. Aortic valve - Opens the way for rich blood to pass from LV into aorta.

8. A. Right side – receives and sends blood low in O 2 to get more O 2. B. Left side – receives O 2 rich blood and pumps to whole body. 3. Double Pump- pumps oxygenated & deoxygenated blood (2)

9. Path of Blood 1. Low oxygenated blood enters RA 2. Tricuspid valve 3. RV 4. Contraction (tricuspid-closes, pulmonary-opens) 5. Pulmonary artery

11. 6. Branches into R & L lung 7. Gas exchange CO2-O2 8. Oxygenated blood enters LA 9. Mitral valve 10. LV 11. Contracts (Mitral-closes, aortic opens) 12. aorta 13. Fills capillaries

12. Path of Blood- 13 steps

14. Label and color the following structures: 1. superior vena cava9. mitral valve 2. inferior vena cava10. aortic valv 3. RA11. mitral valve 4. tricuspid valve12. LV 5. RV13. Chordae tendena 6. pulmonary valve14. aorta 7. pulmonary arteries15. papillary mus. 8. pulmonary veins16. septum 9. LA17. apex

19. http://www.nhlbi.nih.gov/health/dci/Diseases/ hhw/hhw_pumping.html

20. HEART BEAT vital sign calculated in “bpm” males 70 bpm females 75 bpm newborn-1303 years- 100 3 months-15012 years- 85 1 year- 125adult- 60-101

21. A. Heart Rate Abnormalities 1. Tachycardia: rapid beating of the heart 2. Bradycardia: slow beating of the heart – heart rate under 60 bpm

22. B. Target Heart Rate: Desired range of heart rate reached during aerobic exercise. Age Target HR Zone 50–85 % Average Maximum Heart Rate 100 % 20 years100–170 beats per minute200 beats per minute 25 years98–166 beats per minute195 beats per minute 30 years95–162 beats per minute190 beats per minute 35 years93–157 beats per minute185 beats per minute 40 years90–153 beats per minute180 beats per minute 45 years88–149 beats per minute175 beats per minute 50 years85–145 beats per minute170 beats per minute 55 years83–140 beats per minute165 beats per minute 60 years80–136 beats per minute160 beats per minute 65 years78–132 beats per minute155 beats per minute 70 years75–128 beats per minute150 beats per minute

23. Heart Sounds LUB-S1: Block reverse blood flow due to closure of atroventricular valves (mitral, tricuspid) DUB-S2: sudden block of reversing blood flow due to closure of aortic and pulmonary valves.

24. Heart Sounds http://www.blaufuss.org/

25. Heart Mumors Abnormal sounds due to a turbulent flow of blood Causes: blood flowing faster increase in blood illnesses (fever, anemia)

26. 2. Control of Heartbeat – 2 nodes A. SA (sinoatrial) node: “pacemaker”- controls the frequency at which the heart beats, inside RA and flows over both atriums.

27. B. AV (atrioventricular) node: picks up impulse from SA and flows down the septum to carry the impulse over each of the ventricles.

28. EKG (electrocardiogram) the tracing of the hearts electrical activity. Help diagnose arrhythmias.

29. 3 types of waves 1. P wave: records electrical activity of atria 2. QRS wave: records electrical activity of ventricles 3. T wave: records the hearts return to rest

31. Pulse: “heart rate”-rate at which your heart beats. Pulse is what you feel over an artery as the pressure inside increases following each heart beat.