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Do Now – 02/23/18. Make a list of different things that circulate? These items can include items both inside and outside of the body. Write in complete sentences!. Cardiovascular System. Mrs. Hill. Cardiovascular System - Cardio- Heart - Vascular- Blood Vessels. Circulatory Functions.
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Do Now – 02/23/18 • Make a list of different things that circulate? These items can include items both inside and outside of the body. • Write in complete sentences!
Cardiovascular System Mrs. Hill
Cardiovascular System - Cardio- Heart - Vascular- Blood Vessels
Circulatory Functions • To move, circulate, blood around the body. • To transport; oxygen, nutrients, and waste around the body.
Heart Structure • Strongest muscle in the body • Located close to the middle of the chest
Heart is made up of 3 layers • Pericardium (outer layer) - Fluid filled sac that cushions the heart and prevents irritation
Myocardium (bulk of the heart) - Specially constructed muscle tissue cardiac muscle
Endocardium (heart lining) - Tissue that lines the chambers of the heart and the valves of the heart
The heart is divided into 4 chambers • Atrium (upper two chambers) -blood enters the heart into these chambers Ventricles (lower two chambers) -blood exits the heart from these -chambers are larger and have thicker walls -left ventricle has the thickest walls
Valves (permit) the flow of blood in one direction • Tricuspid valve • Between the rt atrium and rt ventricle Mitral valve (bicuspid) • Between left atrium and left ventricle Semilunar Valves - Located inside the pulmonary artery and aorta
Blood Vessels • Arteries - carries blood away from the heart - all arteries carry oxygenated blood, except for the pulmonary artery
Veins - carry blood back to the heart - all veins carry deoxygenated blood, except for pulmonary veins
Capillaries - attach small arteries to small veins - 1 mil long, 25 to make an inch, joined end to end would extend 62,000 miles - allow the transfer of oxygen, nutrients, and waste between cells of the body and blood - this transfer, diffusion, occurs here because the walls are only one cell thick
Do now- 02/27/18 • What are the 3 layers the heart is made up of? • Explain one of the layers. Write in complete sentences!
Circulatory Problems • Heart Disease (Coronary Artery Disease) • Heart Attack- blood supply to the heart is reduced or stopped • Cardiac Arrest- heart stops beating • Hypertension- abnormally high blood pressure in arteries, may increase the chance of a heart attack or stroke
Problems • Leukemia-a cancer of the tissue of the body that produces WBC’s • Anemia-number of RBC’s or hemoglobin is below normal • Hemophilia- a genetic disease in which blood doesn’t clot or clots very slowly • Sickle Cell Anemia-genetic condition, were RBC’s clump together
Heart Anatomy Word Bank • Pulmonary Vein -Aorta • Right Atrium -Inferior Vena Cava • Left Atrium -Pulmonary Artery • Right Ventricle -Septum • Left Ventricle -Superior Vena Cava
Superior Vena Cava Aorta Pulmonary Arteries XX Pulmonary Veins Right Atrium Left Atrium XX XX Left Ventricle Right Ventricle Inferior Vena Cava XX Septum
Resting Heart Rate • 70 Beats per minute • X 60 minutes in an hour • 4200 beats per hour • X 24 hours in a day • 100,800 Beats per day • X 365 Days per year • 36,792,000 Beats per Year • X 75 Years • 2,759,400,00 Beats in a life time
Resting Heart Rate • 60 Beats per Minute • X 60 Minutes in an hour • 3600 Beats per hour • X 24 hours in a day • 86,400 Beats per day • X 365 days per year • 31,536,000 beats in a year • X 75 years • 2,365,200,000 beats in a life time
Resting Heart Rate Difference • 2,759,400,000 Beats in example 1 • -2,365,200,000 Beats in example 2 • 394,200,000 less beats in a lifetime • :- 31,536,000 Beats per year • 12.5 extra years of heart beats
What are some other choices we make that can cause us to use up our heart beats faster.