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Cardiovascular System Anatomy and Physiology Review for Dentistry, Study notes of Dentistry

Our Lady of Fatima University (OLFU)Dentistry

A concise overview of the cardiovascular system, focusing on the heart's anatomy and physiology. It covers essential components such as the heart chambers, valves, and the conduction system. Key topics include the cardiac cycle, heart sounds, and ecg interpretation, offering a structured review suitable for dental students. The material is presented in a clear, point-by-point format, making it easy to grasp the fundamental concepts of cardiac function and regulation. It also includes flashcard-style questions and answers to reinforce learning and test comprehension, making it a valuable study aid for students preparing for exams or seeking a quick review of cardiovascular anatomy and physiology.

Typology: Study notes

2018/2019

Available from 07/21/2025

arena-mridha
arena-mridha 🇵🇭

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GENERAL ANATOMY-1 Reviewer
Cardiovascular System
For Dentistry
COMPOSITION
• Heart (pumping organ)
• Blood vessels
• Blood
• Closed pump system
HEART
• Main pump of the cardiovascular system
• Size: approximately the size of a closed fist
• Weight:
o Male: 250–390 g
o Female: 200–275 g
• Location: middle mediastinum, between sternum and vertebral column
• Apex: directed inferiorly and to the left at the 5th intercostal space, lies on diaphragm
• Base: opposite apex, directed posteriorly, superiorly, and to the right
• Anteriorly: lies just below the 2nd rib
PERICARDIUM
• Connective tissue covering the heart providing protection
• Two layers:
1. Fibrous pericardium: tough, inelastic dense irregular connective tissue; prevents
overstretching and anchors heart
2. Serous pericardium: thinner, more delicate
§ Parietal layer: outer, fused to fibrous pericardium
§ Visceral layer (epicardium): inner, adheres tightly to heart surface
PERICARDIAL CAVITY
• Space between parietal and visceral layers
• Contains pericardial fluid to reduce friction during heartbeats
• Pericarditis: inflammation of pericardium
CARDIAC WALLS
1. Epicardium: outer layer (visceral serous pericardium)
2. Myocardium: middle layer of thick cardiac muscle, responsible for pumping
3. Endocardium: inner thin connective tissue layer
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GENERAL ANATOMY- 1 Reviewer Cardiovascular System For Dentistry COMPOSITION

  • Heart (pumping organ)
  • Blood vessels
  • Blood
  • Closed pump system HEART
  • Main pump of the cardiovascular system
  • Size: approximately the size of a closed fist
  • Weight: o Male: 250 – 390 g o Female: 200–275 g
  • Location: middle mediastinum, between sternum and vertebral column
  • Apex: directed inferiorly and to the left at the 5th intercostal space, lies on diaphragm
  • Base: opposite apex, directed posteriorly, superiorly, and to the right
  • Anteriorly: lies just below the 2nd rib PERICARDIUM
  • Connective tissue covering the heart providing protection
  • Two layers:
  1. Fibrous pericardium: tough, inelastic dense irregular connective tissue; prevents overstretching and anchors heart
  2. Serous pericardium: thinner, more delicate § Parietal layer: outer, fused to fibrous pericardium § Visceral layer (epicardium): inner, adheres tightly to heart surface PERICARDIAL CAVITY
  • Space between parietal and visceral layers
  • Contains pericardial fluid to reduce friction during heartbeats
  • Pericarditis: inflammation of pericardium CARDIAC WALLS
  1. Epicardium: outer layer (visceral serous pericardium)
  2. Myocardium: middle layer of thick cardiac muscle, responsible for pumping
  3. Endocardium: inner thin connective tissue layer

ARTERIAL BLOOD SUPPLY

  • Left and right coronary arteries branch off ascending aorta VENOUS DRAINAGE
  • Coronary sinus drains into right atrium HEART CHAMBERS
  • Two superior chambers: right atrium, left atrium
  • Two inferior chambers: right ventricle, left ventricle SEPTA
  • Interatrial septum: separates right and left atria
  • Interventricular septum: separates right and left ventricles HEART VALVES Cusp or flap-like folds
  1. Atrioventricular valves § Tricuspid valve (right side) § Bicuspid/Mitral valve (left side)
  2. Semilunar valves § Pulmonic valve (right ventricle to pulmonary trunk) § Aortic valve (left ventricle to ascending aorta) VALVES, CHORDAE TENDINEAE & PAPILLARY MUSCLES
  • Work together to prevent valve prolapse during contraction CONDUCTION SYSTEM OF THE HEART
  1. Sinoatrial (SA) node: pacemaker initiating electrical impulses
  2. Atrioventricular (AV) node: delays impulse, located near interatrial septum
  3. Atrioventricular bundle (Bundle of His): conducts impulses to ventricles, divides into right and left branches
  4. Purkinje fibers: spread impulses through ventricular myocardium CARDIAC CYCLE
  • One heartbeat = sequential contraction (systole) and relaxation (diastole) of atria and ventricles
  • Systole: contraction phase following depolarization

Q: What valves separate atria from ventricles? A: Atrioventricular valves — tricuspid on right, bicuspid (mitral) on left. Q: What is the function of the SA node? A: Acts as the heart’s pacemaker initiating electrical impulses. Q: What causes the first heart sound (S1)? A: Closure of atrioventricular valves during ventricular systole. Q: What does the QRS complex on an ECG represent? A: Ventricular depolarization. Q: Describe the role of the pericardial fluid. A: It reduces friction between the parietal and visceral layers of the pericardium as the heart beats. Q: How does the myocardium contribute to heart function? A: It is the thick muscular layer responsible for contracting and pumping blood. Q: What is the pathway of electrical conduction through the heart? A: SA node → AV node → Bundle of His → right and left bundle branches → Purkinje fibers. Q: Why are the papillary muscles and chordae tendineae important? A: They prevent inversion or prolapse of atrioventricular valves during ventricular contraction. Q: Explain the difference between systole and diastole. A: Systole is the contraction phase pumping blood out; diastole is the relaxation phase allowing chambers to fill. Q: What mechanisms regulate blood pressure and heart rate? A: Baroreceptor reflex, chemoreceptor reflex, and hormonal regulation (adrenal medulla and renin-angiotensin-aldosterone system).