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Lecture 14

Lecture 14: Heart

QuestionAnswer
Pericardium most superficial part, protects and stabilizes the position of the heart
Serous Pericardium deep to the pericardium, a double layered serous membrane
Epicardium visceral layer of the serous pericardium
Myocardium made of cardiac muscle intermingles with connective tissue to hold muscle cells together
Endocardium inner surface of the myocardiocytes and lines the chamber of the heart
Pulmonary Circuit short, low pressure circulatory system
Systemic Circuit long, high pressure circulatory system
Right Atrium venous deoxygenated blood, thin walls
Pectinate muscles form the anterior wall of the atria
Left Atrium receives oxygenated blood from the lungs, also has thin walls
Right Ventricle recieves blood from right atrium
Left ventricle recieves oxygenated blood from left ventricle
Atrioventricular Valves tricuspid (R) and mitral valve (L)
Semilunar aortic and pulmonary valve, separate ventricles from arteries
Diastole relaxation
systole contraction
Ventricular filling mid to late diastole
EDV end diastolic volume, volume of blood within the ventricle
Ventricular systole ventricles begin to contract
Isoventricular Contraction ventricle contracts, volume of blood remains the same because both valves are closed
Isovolumatric relaxatoin early diastole
ESV end systolic volume, blood that remains within the ventricle after the ejection phase
Preload level of cardiomyocytes stretch
Frank-Starling law within a physiological range of EDV and increase in EDV corresponds to an increase of ventricular contractility
Afterload arterial pressure or peripheral resistance
Contractility strength of contraction at any given length
Inotropic increase contractility of the cardiac muscle
Chronotropic increase frequency of heart cycle
Created by: rlmurp09
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