Download EMI Huang: First third of NED CIRC NOTES 2009 Systole: Heart

yes no Was this document useful for you?
   Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Document related concepts

Quantium Medical Cardiac Output wikipedia, lookup

Dextro-Transposition of the great arteries wikipedia, lookup

Antihypertensive drug wikipedia, lookup

Myocardial infarction wikipedia, lookup

Cardiac surgery wikipedia, lookup

Lutembacher's syndrome wikipedia, lookup

Coronary artery disease wikipedia, lookup

Management of acute coronary syndrome wikipedia, lookup

Atrial septal defect wikipedia, lookup

EMI Huang: First third of NED CIRC NOTES 2009
Systole: Heart ventricles contract/chamber pump
Diastole: Heart ventricles relax/chamber fills
AIM: What are the parts of the heart and blood?
William Harvey established direction of blood flow and elucidated difference between pulmo
and systemic circulation.
Pulmonary: travel of blood between heart and lungs
Coronary: supplies blood to heart
Renal: supplies blood to kidneys
Hepatic portal: supplies liver with nutrients; receive oxygenated blood from the aorta
Atria: blood into upper chambers
Ventricles: blood out of lower chambers. Valves/regulated one-way flow.
A/V: Atria Ventricular S/L: Semilunar
(Valves separate chambers, preventing blood from mixing)
2 A/V valves separate atria from ventricles
1. Right A/V: tricuspid (3 teeth)
2. Left A/V: bicuspid or mitral
2 S/L valves regulate flow from ventricle to vessel
1. Right S/L: pulmonary
2. Left S/L: aortic
Aorta: major artery carrying blood from heart
Vena cava(e): empty deoxygenated blood into right atrium
Pulmonary artery: leaves right ventricle and carries blood to lungs
Pulmonary veins: returns oxygenated blood from lungs to left atrium
Left side [of chamber]: delivers blood to systems (systemic)
Right side [of chamber]: delivers blood to lungs (pulmonary)
Cardiac muscle contracts in syncitium. Nodes stimulate atria and ventricles to act together.
SA (Sinoatrial) node: located in right atrium—is considered ‘pacemaker.’ Atria contract together.
AV (Atrioventricular) node: located in septum (wall) between atria—delays ventricle contraction
until ventricles fill with blood.
-Harvey (17th century)- discovered veins-toward and arteries-away.
-Previously, Galen’s predominate idea that blood ebbed and flowed without direction had
taken hold.
-Harvey challenged authority—did a dissection experiment—artery cut—blood spurts from and
near heart (artery flow from heart). Vein cut—blood flows from end farther from heart, inward
or forward.
-Capillaries were harder to study—Malpighi discovered them in 1661; wanted for instruments.