Pathway of Blood Flow
After exiting the left atrium what valve does the blood go through before entering the left ventricle?
Mitral or Bicuspid Valve
What are the thicker and more powerful champers of the heart?
Ventricles
The ______ is the pacemaker of the heart.
Sinoatrial (SA) node
What is Congested Heart Failure?
A progressive heart disease where the muscle in the heart can't pump blood resulting in tiredness, chest pain, decrease in physical activity, swelling, and rapid/irregular heartbeat.
Where is the apex of the heart located?
To the left of the midline of the body. (Pointy piece of heart on the bottom)
What 2 veins feed the right atrium with blood?
Superior and Inferior Vena Cava
What is the deepest layer of the heart?
Endocardium
The atrioventricular node (AV) lies on what side of the heart?
Right side
Explain tachycardia and bradycardia.
Tachycardia- increase in heart rate
Bradycardia- decrease in heart rate
Where does the heart sounds LUB-DUB come from?
LUB- closed AV valves (Tricuspid & Mitral (bicusid) vavles)
DUB- Opened Pumlonary Valve
What 2 valves does oxygen-rich blood pass through?
Mitral or bicuspid & Aortic valve
What is the shallow depression seen on the external surface of the heart between the left and right ventricle called?
Interventricular Sulcus
At the base of the heart, atrioventricular bundles start to divide into what?
Purkinje Fibers
What is it called when the heart has a faster or increased heartbeat? (Hint: not tachycardia)
Atrial Fibrillation
Obstruction of the ____ will cause a more severe myocardial infarction than the obstruction of many others.
Left coronary artery (LCA)
When the right venticle contracts, the ______ valve closes and the _______ valve is pushed open.
Tricuspid valve & Pulmonary valve
What is the most superficial layer of the heart?
Parietal Pericardium
What structure is located in the septum of the heart?
Bundle Branches
_____ is an inadequate blood supply to an organ or body, especially in the heart muscles.
Ischemia
Opening and Closing of the heart valves is caused by what?
Pressure Gradient
Does the pulmonary artery carry oxygen-rich or oxygen-poor blood?
Oxygen-poor blood
What is the space the heart is located in called?
Mediastinum
After leaving the AV node where does the conduction go next?
Bundle of his
Chest discomfort or shortness of breath caused when heart muscles receive insufficient oxygen-rich blood is an example of this type of disease.
Angina
What are 2 features of cardiac muscle?
- They depend almost exclusively on aerobic respiration.
- They are rich in glycogen.
- They have larger than average mitochondria.
- They are very rich in myoglobin.