Vocabulary. Heart attack- התקף לב (hetkef lev)

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2 Vocabulary Cardiovascular (CV) System- מערכת לב וכלי דם (ma arechet lev v klay dahm) Blood- דם (dahm) Blood vessels- כלי דם (klay dahm) Artery/Arteries- עורק/ עורקים (ohrek/ohrakeem) Vein/Veins- וריד/ורידים (vhreed/vhreedeem) Capillary/Capillaries- נימים/נים (neem/neemeem) Heart- לב (lev) Angina pectoris- אנגינה (angina) אוטם בשריר הלב (MI)- Myocardial Infarction Heart attack- התקף לב (hetkef lev)

3 Anatomy דם Blood- :כלי דם vessels- Blood עורקים Arteries- ורידים Veins- קפילרות / נימים Capillaries- לב Heart-

4 The Blood The volume of the blood is about 7%-8% of our body weight (6-8 liters) Plasma= 55% of blood Cells= 45% of blood

5 Blood Composition Functions Blood Component Function Red blood cells White blood cells Platelets Plasma Give blood its color, carry O 2 to organs.-hemoglobin Part of immune system Essential for clotting Carries blood cells, nutrients, carry C02 away

6 כלי דם Vessels- Blood

7 Blood Vessels - Arteries Carry blood AWAY from the heart. 3 layers: outside layer, middle thick muscle layer (flexible, can withstand high pressure), inner layer of capillaries. Hollow in the center for blood to flow through

8 Blood Vessels - Veins carry blood TO the heart 3 layers: outside layer, inner muscle layer (thinner than arterial muscle not as flexible as artery), inner layer of capillaries. Hollow in the center for blood to flow through.

9 Blood Vessels - Capillaries Very thin 1 cell layer thick, non-muscular Where exchange of water, gases, and nutrients takes place

10 Blood Vessels - Coronary Arteries Arteries that go from the aorta to the heart mussel itself Right after the aorta starts, there are arteries that split off and go directly to the heart. These are the coronary arteries. If one is blocked, cells in the heart can t get oxygen. A blocked artery can be fatal (if oxygen can t get to the heart, the heart can t pump blood, and blood does not get to the body).

11 Heart- -לב location Diaphragm The heart location is the mediastinum, retrosternal between the ribs 2 & 6

12 לב Heart- The heart is as big as a fist. It weighs around gr. When contracting systole : sending out blood. When expanding diastole : refilling with blood. Every beat send out about 70 cc of blood Adult heart bits between bpm

13 Conduction System Sinoatrial (SA) Node Atrioventricular Node Normal Sinus Rhythm

14 Basic Rhythm Disturbances Bradycardia is a heart rate of less than 60 beats per minute Tachycardia is a heart rate of more than 100 beats per minute Asystole (flat line) occurs in the absence of any electrical activity in the heart Ventricular fibrillation is chaotic electrical activity in the heart

15 External View of Heart

16 The Heart Left side of the heart: Rich with O2 4 pulmonary arteries enters the left atrium The aorta coms out from the left ventricle Right side of the heart: Rich with CO2 The superior and inferior vena cava enters the right atrium The pulmonary artery coms out from the right ventricle

17 Blood vessels entering & exiting the heart

18 Internal View of Heart Aortic valve Pulmonary valve Atria C4-22 Ventricles

19 Blood Cycle-Systemic Circulation ( large cycle ) Part of the blood cycle that supplies blood to the body Oxygenated blood goes from the Left Atrium to the Left Ventricle and gets pumped out the Aorta to the body. Deoxygenated blood gets returned to the Right Atrium through the Vena Cava.

20 Blood Cycle-Pulmonary Circulation ( small cycle ) Part of the Blood Cycle that give the blood oxygen Deoxygenated blood leaves the Right Ventricle through the Pulmonary Artery and goes to the lungs. In the lungs, carbon dioxide is exchanged for oxygen and the oxygenated blood returns to the Left Atrium.

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