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The Heart's own pace maker
The heart beats regularly because it has it's own pacemaker. The pacemaker is a small region of muscle called the sinoatrial, or SA, node. It is in the upper back wall of the right atrium. The node triggers an impulse that causes both atrium to contract. Very quickly, the impulse reaches the atrioventricular, or AV, node at the bottom of the right atrium. Immediately, the atrioventricular node triggers an impulse that causes both ventricles to contract.
What else can I help you with?
Flaps of connective tissue called valves are located between the atria and the ventricles?
TRUE
Are auricles extensions of the atria or the ventricle?
The are extentions of the Atria.
The upper chambers of the heart are called what?
The left and right atrium (or atria).
What is the organ that has two atria and one ventricle in a frog?
The heart is the organ that has two atria and one ventricle.
Why do he atria appear collapsed on a preserved specimen?
Because there is no blood/pressure within the atria to keep it open
Is the atria of the heart located superiorly?
Yes, the atria are the superior chambers of the heart.
Where are the anterooms of the heart located?
The "anterooms" of the heart are also known as the atria.
Where are the atria located What is their function and characteristics?
it is located in the heartThe Atria (plural) or Atrium (singular) are the chambers located in the top of the heart. Below the Atria are the Ventricles.There are two atria in the heart, the left atrium and the right atrium.Atria are located in the heart.
Where is the electrical conduction of the atria located?
Purkinje fibers
Tricuspid valve were is it located?
The tricuspid valve is located between the right atria and ventricle.
The atria of the heart are the chambers that are?
located superiorly and are the receiving chambers of the heart
How many atria does the cat heart have?
Felines have two atria in their hearts. Located on either side of the organ, they are called the right atrium and the left atrium.
Are ventricles superior?
In the context of the heart, the ventricles are not considered superior; they are actually located inferior to the atria. The atria are positioned above the ventricles, receiving blood from the body and lungs before it is pumped into the ventricles. Therefore, in anatomical terms, the atria are superior to the ventricles.
Flaps of connective tissue called valves are located between the atria and the ventricles?
TRUE
What are the internal ridges of the atria called?
The internal ridges of the atria are called pectinate muscles. They are muscular ridges that line the atrial walls, primarily located in the right atrium and the auricles of both atria. Pectinate muscles help increase the surface area of the atria and assist in the contraction of the atrial walls during the cardiac cycle.
Are auricles extensions of the atria or the ventricle?
The are extentions of the Atria.
What is the downstairs chamber in the heart?
the atria
