Function
The impulses (action potentials) that trigger myocardial contraction must e coordinated carefully
How does the heart pump effectively?
Name of the upper heart chambers
What is the atrium?
A heart attack can happen if this clogs arteries
What is cholesterol?
In the mediastinum or middle region of the thorax, just behind the body of the sternum between the points of attachment of the second through the sixth ribs.
Where is the heart located?
What part of the heart is the outer layer of the heart wall ?
What is Epicardium ?
1. Sinoatrial (SA) node
2. Atrioventricular (AV) node
3. Atrioventricular (AV) bundle (bundle of his)
4. Subendocardial branches (purkinje fibers)
What are the four structures that make up the core of the electrical conduction system of the heart?
A number of chambers in a mammalian heart?
What are 4?
What is one thing that may cause a heart attack?
What are diet, obesity, smoking, high blood pressure, drugs, heredity?
Two-thirds of the hearts mass are to the left of the midline of the body, and one third is to the right
Where is the hearts mass?
What is the bulk of the heart wall that is thick, and the middle layer of arranged cardiac muscle cells ?
What is Myocardium ?
Cardiac muscle modified enough in structure to differ I function from ordinary cardiac muscle
What does the hearts conduction system consist of?
This heart chamber pumps blood to lungs.
What is the right ventricle?
A ruptured (broken) blood vessel in the brain causes this.
What is a stroke?
Just below the second rib.
Where does the upper border of the heart lie?
What is the lining of interior of the myocardial wall that is a delicate layer ?
What is Endocardium ?
Fibers that initiate signals
What are pacemaker fibers?
Prevents blood from going backward
What are the valves?
This machine performs the function of your heart and lungs in a bi-pass surgery.
What is the heart/lung machine?
How to maintain blood flow?
Rhythmic compression of the heart in this way can maintain blood flow in cases of cardiac arrest.
What is the two superior chambers of the heart that separate in the middle by the interatrial septum ?
What is Atria ?
Rapid conduction through the syncytium of connected cardiac fibers
What are conduction fibers?
This is the largest heart chamber. (which pumps blood to rest of body).
What is the left ventricle?
Give an example of a gliding joint
joints between the facets of the adjacent vertebrae.
The lower border of the heart, which forms a blunt point
What is the apex?
What is the name of the two lower chambers from the heart that are separated in the middle by the interventricular septum ?
What are Ventricles ?