Histology of Cardiac Muscle tissue Flashcards
What are “Auto-rhymic Fibres”?
They are the source of the electrical activity is a network of specialized cardiac muscle fibres called “Auto-rhythmic Fibres”.
What does it mean for the Specialized Cardiac Tissue to be “Self Excitable”?
This means they will repeatedly generate action potentials that trigger heart contractions.
What do “Auto-rhythmic Fibres” provide for the heart?
- Pacemaker
2. Cardiovascular Conduction system
How does a Cardiac Action Potential propagate through the conduction system?
1. 2. 3. 4. 5.
What does it mean when the Auto-rhytmic fibres of the heart act as a Pacemaker?
They help set the rhythm of the electrical excitation that causes contraction.
What is the Cardiac Conduction System?
This is a Network of specialized cardiac muscle fibres that provide a path for each cycle of cardiac excitation to progress through the heart.
What helps form the Cardiac Conduction System?
Auto-rhymic Fibres of the Heart.
What is the (SA) node?
The “Sinoatrial node” is
Where is the (SA) node located?
Located in the right atrial wall just inferior & lateral to the opening of the superior vena cava.
What is a “Pacemaker Potential”?
This is the rapid Depolarization of the (SA) node.
What is the purpose of the Conduction system?
This is to make sure the Chambers of the heart contract in a coordinated manner.
How does an Action potential occur in a Contractile Fibre?
- Depolarization
- Plateau
- Repolarization
What is Ausculations?
This is the act of listening to sounds within the body usually done with a Stethoscope.
What is Ausculations?
This is the act of listening to sounds within the body usually done with a Stethoscope.
What is the main source of the sound of the blood?
This comes from the turbulence of the blood caused by closing of the heart valves.
