© 2004 Plano ISD, Plano, TX The Heart

© 2004 Plano ISD, Plano, TX How many times a day does your heart beat? a. over 10,000 times b. over 100,000 times c. over 1,000,000 times d. over 10,000,000 times

© 2004 Plano ISD, Plano, TX the name given to the heart, blood vessels and blood which transport oxygen and nutrients to all parts of the body as well as carry away waste products Circulatory System

© 2004 Plano ISD, Plano, TX Medieval beliefs about the circulatory system: Blood was like a tide that oozed in all directions without a particular path. The heart controlled the emotions. The heart controlled the emotions. The heart controlled the emotions. The heart controlled the emotions. The heart controlled the emotions. The heart controlled the emotions.

© 2004 Plano ISD, Plano, TX Components of the Circulatory System blood connective tissue made of plasma and cells heart muscular pump to move blood blood vessels veins, arteries, capillaries that deliver blood to all parts of body

© 2004 Plano ISD, Plano, TX Structure of the Heart

© 2004 Plano ISD, Plano, TX hollow, muscular organ about the size of your clenched fist pumps about 3,400 gallons/blood a day can pump up to 12 gallons per minute primary organ of circulatory system

© 2004 Plano ISD, Plano, TX Right Atrium Left Atrium Right Ventricle Left Ventricle 4 chambers

© 2004 Plano ISD, Plano, TX aorta pulmonary artery main artery of the circulatory system only artery that carries oxygen-poor (deoxygenated) blood

© 2004 Plano ISD, Plano, TX a valve between each ventricle of the heart and the artery connected to that ventricle, preventing blood from flowing back into the heart wall separating two ventricles preventing mixing of blood septum semilunar valves

© 2004 Plano ISD, Plano, TX

Identify the parts of the heart. Which part sends blood to all parts of the body? Which parts are the ventricles? Which parts are the atria? What single term describes structures 2, 3, 4, and 6?

© 2004 Plano ISD, Plano, TX Circulation

© 2004 Plano ISD, Plano, TX Blood Flow through the Heart

© 2004 Plano ISD, Plano, TX Blood flows from two large veins into the right atrium. Step 1

© 2004 Plano ISD, Plano, TX The blood then flows down to the right ventricle Step 2

© 2004 Plano ISD, Plano, TX From the right ventricle, blood is pumped to the lungs where CO 2 is exchanged for O 2. Step 3 (CO 2 - waste product from cells)

© 2004 Plano ISD, Plano, TX After O 2 is added in the lungs, blood returns to the left atrium. Step 4

© 2004 Plano ISD, Plano, TX The blood is then sent to the left ventricle. Step 5

© 2004 Plano ISD, Plano, TX The left ventricle pumps blood away from the heart to the rest of the body via the aorta. Step 6 aorta - main artery of the body

© 2004 Plano ISD, Plano, TX lungs Blood leaves the heart, passes through arteries until it reaches capillaries located throughout the body.

© 2004 Plano ISD, Plano, TX lungs In the capillaries, CO 2 and waste products are exchanged for O 2 and nutrients.

© 2004 Plano ISD, Plano, TX lungs Blood returns to heart through the veins.

© 2004 Plano ISD, Plano, TX deoxygenated blood TO lungs oxygenated blood FROM lungs

© 2004 Plano ISD, Plano, TX Gas Exchange

© 2004 Plano ISD, Plano, TX tissuealveoli O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 CO 2 capillary CO 2 O2O2 Gas exchange occurs between the thin walls of the alveoli and the thin walls of the capillaries. CO 2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2

© 2004 Plano ISD, Plano, TX Heart Disorders

© 2004 Plano ISD, Plano, TX What happened to David Letterman???

© 2004 Plano ISD, Plano, TX Coronary Bypass Surgery a type of open heart surgery Chest is opened. Heart is exposed but not opened. Involves two surgeons.

© 2004 Plano ISD, Plano, TX One surgeon works on the chest. Another surgeon takes a length of vein from inside the lower leg.

© 2004 Plano ISD, Plano, TX black areas - blockages damaged heart tissue due to insufficient blood supply

© 2004 Plano ISD, Plano, TX vein(s) sewn (grafted) on outside of heart above blockage(s) and below blockage(s)

© 2004 Plano ISD, Plano, TX double bypass triple bypass

© 2004 Plano ISD, Plano, TX commonly called CABG-- pronounced “cabbage” C - coronary A - artery B - bypass G - graft Coronary Bypass Surgery

© 2004 Plano ISD, Plano, TX Now, put on your scrubs and let’s do a heart transplant. Heart Transplant