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What structure of the conduction system helps to cause the constriction of the ventricles and extend from the atrioventricular node?
Wiki User
∙ 15y ago
The conduction speed slows when it reaches the bundle of His, and then speeds up as it travels along the Purkinje fibres to the base of the ventricles.
Wiki User
∙ 15y ago
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The structure and function of right atrium?
The structure of the right atrium is to send blood through an atrioventricular valve to the right ventricle and it's structure is mostly muscle and tissue.
Is it possible to have an uneven split of an embryo?
This was a research done by Hans Spemann, an embryologist of the early 20th century in Germany. His research lead him to conclude that the dorsal and ventral (top and bottom) halves of the embryo were different. The top half contained a certain group of cells that organize development. They are visible on the dorsal surface of a 2-cell-stage embryo. The outcome of his constriction experiments depended on exactly where this structure was in relation to the constriction. If one half of the constriction contained the entire structure, it would develop into an embryo that could live and the other half developed into the belly-piece. If the structure was evenly split during the constriction, the result was twin, including Siamese twin, embryos. If it was split unevenly, it resulted (in some cases) an embryo with two heads (a Siamese twin). He also inadvertently discovered a way to clone during this process of constricting embryos as they split.
Describe the skeleton of the heart?
Quote from Wikipedia:"Cardiac skeleton (sometimes called "fibrous skeleton of the heart") refers to the structure of dense connective tissue in the heart that separates the atria from the ventricles. It is not a "true" skeleton, but it does provide structure and support for the heart, as well as isolating the electric charges that go through the heart by slowing them down enough to allow the atriums to contract before the ventricles so that the heart is much more efficient. It also allows the valves (bicuspid, tricuspid, semilunar) to keep open by giving them structural support."I do wonder why you didn't google it though...
Name the structure between the left atrioventricular valve and the papillary muscle?
The chordae tendineae connect the AV valve and the papillary muscle. These structures work together to prevent backflow from the ventricle to the atrium.
Which of the following brain areas serves as the major control center of the autonomic nervous system and endocrine system?
The heart initiates its own beat beginning at the sinoatrial node, then moving to the ventricles (lower lobes) via the atrioventricular node, and down thru the Bundle of His.
At what structure in the transmission sequence is the impulse temporarily delayed and why?
ATRIOVENTRICULAR (AV) NODE; THIS DELAY IS IMPORTANT BECAUSE IT ENSURES THAT THE ATRIA HAVE EJECTED THEIR BLOOD INTO THE VENTRICLES FIRST BEFORE THE VENTRICLES CONTRACT. as found in easy notecards .com
Structure that carries the heart electrical impulse into the ventricle?
The atrioventricular (AV) node sends the signal to the AV bundle, where the wave of contraction travels from the atria to the ventricles.
Can someone help you decipher your EKG report It says sinus tachycardia borderline AV conduction delay and probable left atrial abnormality.?
sinus tachycardia = rapid heartbeat borderline av conduction delay = a slight delay in the conduction of electrical impulse from the atria, at the top of the heart, to the ventricles, at the base of the heart. The ventricles are the chambers that do the pumping of blood to the lungs and to the body. The atria are the two "collecting" chambers for the blood returning to the heart from the lungs and from the body. The electrical impulse of a heartbeat starts in the right atrium, travels across to the left atrium and down to the top of the ventricles. This causes the atria to contract and push blood through heart valves into the chambers of the heart called Ventricles. The contraction then has a slight pause as the impulse "stimulates" the atrioventricular node to pass the impulse down to the base of the right and left ventricles. When the impulse passes the AV node, the ventricles contract and push the blood out to the lungs to be oxygenated and to the body. A slight delay in the conduction of the impulse is normal but it is only a fraction of a second. Any delay in the conduction which is longer than the "normal" fraction of a second is considered an abnormal av conduction delay. Probable Left Atrial abnormality = some kind of abnormal size, shape, structure, or electrical conduction in the chamber at the top of the left side of the heart. Remember that the atria are chambers for collecting blood returning to the heart. The left atrium is the chamber for collecting blood which is returning from the lungs. This is freshly oxygenated blood. The blood travels from the lungs to the left atrium. When the atria contract, the blood is pushed from the left atrium into the left ventricle. When the ventricles contract, the blood is then pumped from the left ventricle out into the aorta (the largest artery in your body) and then on to the furthest reaches of your body.
What is the Medical term meaning a constriction of a tubular structure?
Contracture is the medical term meaning constriction of tissue.
What structure completely separates the atria from the ventricles?
septum
What structure communicates the lateral ventricles with foramen of Monro?
The foramen of Monro connect the lateral ventricles with the third ventricle.
What structure produces the heart's electochemical impullses?
Cardiac Conduction System (CCS)There are specialized areas of cardiac muscle tissue in the heart that beat on their own.These specialized areas together coordinate the events of the cardiac cycle, which makes the heart an effective pump.Components of CCS:1. Sinoatrial Node (S-A Node) located in right uppermost atrial wall and the primary pacemaker(rhythmically and repeatedly [60-100 per minute] initiates cardiac impulses)2. Atrioventricular Node (A-V Node): located in interatrial septum;serves as a delay signal that allows for ventricular filling. A back up pace maker.3. Atrioventricular (AV) Bundle (Bundle of His): only electrical connection between the atria and ventricles; located in the superior interventricular septum;4. Right and left bundle branches head downward through interventricular septum toward apex, and impulse finally reaches.5. Purkinje Fibers (Conduction Myofibers) large diameter conduction myofibers; located within the papillary muscles of the ventricles and conduct the impulse into the mass of ventricular muscle tissue.
Name the structure found between the atrioventricular valve and the papillary muscle?
interventricular septum
Compare the structure of the right atrioventricular valve with that of the pulmonary valve?
You tell me that is why I'm asking
The structure and function of right atrium?
The structure of the right atrium is to send blood through an atrioventricular valve to the right ventricle and it's structure is mostly muscle and tissue.
What cardiac structure is poorly innervated by the parasympathetic nervous system?
Ventricles
What structure connects the cusps of the AV valves to the ventricles?
papillary muscles
