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Week 7 notes - Chapter 19 - Heart Anatomy and Physiology

by: Kimberly Krause

Week 7 notes - Chapter 19 - Heart Anatomy and Physiology 2402

Marketplace > Tyler Junior College > Biology > 2402 > Week 7 notes Chapter 19 Heart Anatomy and Physiology
Kimberly Krause
Tyler Junior College
GPA 4.0

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We had a test on Monday, so these are Wednesday and Friday's notes. We dived into the heart both anatomy and a little bit of physiology. Cardiac cycle, Blood flow, and Disorders of the heart.
Anatomy and Physiology II
Dr. Cates
Class Notes
Tamponade, Cardiac Cycle, blood flow, arteries, veins, capillaries, Anastomosis, sinoatrial
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This 5 page Class Notes was uploaded by Kimberly Krause on Sunday October 9, 2016. The Class Notes belongs to 2402 at Tyler Junior College taught by Dr. Cates in Fall 2016. Since its upload, it has received 31 views. For similar materials see Anatomy and Physiology II in Biology at Tyler Junior College.

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Date Created: 10/09/16
A and P 2 - Mr. Cates 10/05/16 Chapter 19 - Anatomy of Heart, Vessels, Functions Arteries -The infrastructure of the heart is held up by Arteries carry blood away from the heart. a fibrous skeleton. The heart is made up of 60,000 miles of blood vessels and 5 liters of elastic fibers. blood in blood. Veins Venous pressure = 0 Veins deliver blood to the heart. External heart features Drain and Reservoir the blood. 1. Anterior Sulcus Capillaries 2. Posterior Sulcus The blood changes directions in the 3. Coronary Sulcus capillaries. *Coronary Vessels and Cardiac Veins falls into these grooves. Appearance of blood Dark red blood is deoxygenated -Sometimes circumflex and the posterior Bright red blood is oxygenated interventricular artery DO connect. Oxygen in blood Anastomosis 1/5 of oxygen is lost every minute. You can -more vessels grow in response to a bad only survive without oxygen for 5 minutes lifestyle. and then you are dead. Cold water slows this -Some people have anterior cardiac veins process down. and they drain into the right atrium. Ventricular balance -Angiography is where they inject a dye into Volume has to be the same on both sides. the patient so they can see their distinct vessels. Anatomy of heart details -Atrium means “receiving room” Coronary Sinus is on the back that drains into -Ventricular means “belly” the right atrium. Looks like a “little fanny Circulatory means “circle” pack.” Functionally you have two sides to your heart. Point of Maximal Impulse (P.M.I) is where Left side has to pump farther so it has the your apex thumps on the rib cage. larger muscle. 
 -Valvesin the heart dictate the blood flow. Mitral valve is called that because of the cardinal’s hat is called mitral. Right Pulmonary Veins goes to the Left Atrium. Layers of heart and fibrous -Pericardium is made out of serous membrane. -Fibrous is like a tube over the pericardium. -Epicardium and endocardium are made out of simple squamous epithelium. -Myocardium is the muscle layer in between epicardium and endocardium. A and P 2 - Mr. Cate 10/07/16 Chapter 19 - Disorders of the Heart and Pacemaker Disorders Tamponade -Pressure around the heart grows, but then blood pressure and veins don’t drain in because there’s basically no pressure. Right pump failure -Venous blood will build up. -Capillaries will start to leak more fluid out. Pressure goes up. -Results in Peripheral Edema -Arms and legs swell -Congestive heart failure Left pump failure -Pulmonary capillaries get edema. -Person drowns in their own lungs. -Pulmonary edema -They look normal, but their lungs are filling up. Pacemaker Electric system of the heart Each cardiac muscle has its own pace. The fastest cells sets the pace. In the picture the Sinoatrial node is the fastest at 100, so it keeps the pace. In the heart there are not neurons on each cell, because the neurons are so fragile they would be ripped at the constant wear and tear. The special design of the cardiac cells allows electrical impulse to flow through each one. They are branch in patterns and connected by intercalated disc. In the intercalated disc there are 2 kinds of junctions, which allows for communication between the cells. There’s desmosomes (that hold the cells together) and there’s gap junctions which allow the communication. How this works is the electrical impulse starts with the SA node then it ripples through the muscle cells. Autorhythmic is the term that means that the cells are self- excitable.


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