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68WM6 Cardiovascular

68WM6 Cardiovascular System

Aorta the major systemic artery that recieves blood from the left ventricle.
Arteriole a small branch of an artery that communicates with a capillary network.
Artery thick-walled elastic vessels that carry blood AWAY from heart.
Atrium the chamber of the heart that recieves blood.
Capillary small blood vessels that connect an arteriole and a venule.
Cardiac Cycle a series of cardiac contractions and relaxations that constitute a complete heartbeat.
Cardiac Output volume of blood per minute pumped by the heart.
Diastole phase of a cardiac cycle when a heart chamber wall relaxes.
Electrical Event the electrical conduction of the heart as visualized on an EKG.
Endocardium the inner lining of the heart chambers.
Epicardium the visceral portion of the pericardium on the surface of the heart.
Ischemia the deficiency of blood to a body part.
Mechanical Event the muscular contraction of the heart that sends blood out of the heart.
Mitral Valve the heart valve between the left atrium and left ventricle; also known as the Bicuspid Valve.
Myocardium muscle tissue of the heart
Myocardial Infarction irreversible heart damage secondary to prolonged ischemia.
Pacemaker mass of specialized muscle tissue that controls the rythym of the heart.
What are the two major structures of the pace maker? Sinoatrial Node (SA) and the Atriaventricular Node (AV)
Stroke Volume amount of blood that each ventricle discharges in a heartbeat.
Systole phase of cardiac cycle when a heart chamber wall contracts.
Systemic Circulation movement of blood from the left ventricle throughout the body and back to the right atrium.
Vasoconstriction a decrease in the diameter of a blood vessel
Vein a vessel that carries blood TOWARD the heart.
The heart is a hollow and cone shaped muscular___. pump
The average adult heart is what size? 14cm long and 9 cm wide
The heart is located in the ___. mediastinum
The base is the___portion of the heart. proximal
The base attaches the ____and lies beneath the 2nd rib. great vessels
The Apex of the heart... bluntly pointing leftward, lies on the diaphragm muscle, and is located at the 5th ICS.
Pericardium a serous membrane that surrounds the heart.
The wall of the heart is composed of... Three layers of muscle.
The layers of muscle in the wall of the heart are: Epicardium, Myocardium, and Endocardium.
The EPICARDIUM is the outer layer of the heart that reduces_____from the surrounding organs. Friction
Myocardium cardiac muscle tissue that makes up the bulk of the heart.
Endocardium lines all heart chambers and covers the heart valves.
Deoxygenated Blood returns to the heart via the superior and inferior vena cava.
Oxygenated blood returns from the lungs and enters the left atrium via the______. Pulmonary Veins
Bradycardia Steady contractions below 60 BPM
Ventricular Fibrilation a complete lack of organized electric impulses.
What happens when ventricular fibrilation occurs? BP falls to zero, unconsciousness, and DEATH! within 4 minutes. (BAD news for the home team :( )
Blood Vessels in the heart have how many layers? THREE
Tunica Intima One of the three layers of a cardiac blood vessel AKA endothelium.
Tunica Media Smooth Muscle Layer, Thicker in Arteries, and Thinner in Veins.
Tunica Externa Thickest layer of the vein.
Arteries Thick-wall elastic vessels that carry blood AWAY from the heart.
Arterioles Smallest arteries
Caplillaries Smallest vessels
Venules Small thin-walled vessels
Veins Carry blood TOWARD the heart
Aorta is the LARGEST Artery with three segments: 1.Aortic Arch2.Ascending Aorta3.Descending Aorta
Portal Circulation Carries blood drained from the stomach, intestines, and spleen to the liver.
What is Angina Pectoris? Chest pain caused by inadequate O2 to heart
The two layers of the Pericardium include the Visceral Pericardum (Epicardium) AND ____. Parietal Pericardium
4 Factors that influence BLOOD PRESSURE 1. Blood Volume 2.Strenth of ventricular contractions 3.Blood Viscosity 4.Resistance to Blood Flow
How is fetal circulation different from adult circulation? Circulation before birth is different because the fetus must secure O2 and food from Mothers blood stream.
Fetal Circulation has the following organs that adults do not have: 1. Placenta 2. Umbillical Arteries & Vein 3. Ductus Venosus 4. Foramen Ovale 5. Ductus Arteriosus
What is hepatic portal circulation? The route of blood flow through the liver.
True or False: The Aorta is the largest Artery in the human body. TRUE!!
What are the 3 segments of the Aorta? 1. Aortic Arch 2. Ascending Aorta 3. Descending Aorta
Veins have high OR low pressure? LOW (it is returning to the heart and low in O2)
Arteries have high OR low pressure? HIGH (leaving the heart with high O2)
DE-Oxygenated blood returns to the heart VIA the____. Superior and Inferior Vena Cava
Oxygenated blood leaves the heart via the ___. Aorta
Arteries and Veins have 3 layers they are: 1. Tunica Intima (INSIDE) 2. Tunica Media (MIDDLE) 3. Tunica Externa (OUTSIDE)
Created by: 670441040