Principles - Anatomy 04 - Anatomy of the Heart Flashcards
What are the two types of circulation?
Pulmonary and Systemic
What is the average heart rate?
60 - 100 bpm
What is heart failure?
The heart does not pump well enough
What area of the chest cavity is the heart contained within?
middle Mediastinum
What is the sac that surrounds the heart called?
pericardial sac
What are the two layers of the pericardium?
Fibrous and Serous perdicardium
What is the function of the fibrous pericardium?
Prevents the heart from overfilling
What is the function of the serous pericardium?
Secretes serous fluid
What condition can Haemopericardium lead to?
Cardiac tamponade
What is the area of the serous pericardium that touches the heart called?
Visceral serous pericardium
What is the area of the serous pericardium that does not touch the heart called?
Parietal serous pericardium
What are the three layers of cardiac tissue called?
Epicardium, Myocardium, Endocardium
What is the outermost layer of cardiac tissue called?
Epicardium/visceral serous pericardium
What is the middle layer of cardiac tissue called?
Myocardium
What is the internal layer of cardiac tissue called?
Endocardium
What type of cells make up the endocardium?
Epithelial cells
What is the space between the visceral and parietal serous pericardium called?
Pericardial cavity
What is the bottom tip of the heart called?
Apex
What is the name given to the section of the heart which rests on the diaphragm?
Diaphragmatic
What chamber lies on the right border of the heart?
Right atrium
What chamber lies on the left border of the heart?
Left ventricle
What is the septum between the ventricles called?
Interventricular septum
What is the AV valve on the right hand side called?
Tricuspid valve
What is the AV valve on the left hand side called?
Bicuspid valve
Explain the normal route for electrical conduction in the heart.
Electrical signal originates in the Sinoatrial (SA) node across the atria then to the atrioventricular (AV) node then along fibres in the interventricular septum and then through the myocardium to the ventricles
State 2 function of the fibrous cardiac skeleton
Ensures valves are kept open and retains electrical impulses, ensuring that they travel normally along the fibres
What are cells in the myocardium called?
Myocytes
What is fibrillation?
Uncoordinated contraction of cardiac muscles
State 2 factors that can affect heart rate.
Nerves attached to the heart and chemical signals within the blood