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because the heart of fish only receive only venous blood

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What is called when the intrinsic ability of the heart to pump all the venous return blood?

Starling's Law or the Frank-Starling Law of the heart.


What is the blood pressure within the right atrium called?

The blood pressure within the right atrium is called central venous pressure (CVP). It is a measure of the pressure in the large veins close to the heart and reflects the amount of blood returning to the heart.


What is venous heart?

The part of the heart filled with deoxygenated blood - the right auricle and ventricle of humans. The heart of fishes is venous as it is fully filled with deoxygenated blood.


What controls venous blood pressure?

The heart. All blood pressure is controlled by the heart.


Why the jugular venous pressure falls during inspiration?

because the endothoracic pressure is decreased and the venous return to the heart is increased.


What is venous system of frog?

It is a set of blood vessels which carry blood towards the heart from the all parts of body.These vessels are called veins.


What exchanges blood between the arterial and venous systems?

The arterial and venous systems are connected in the body tissues by capillaries, and also in the heart.


What exchange blood between arterial and venous systems?

The arterial and venous systems are connected in the body tissues by capillaries, and also in the heart.


What does the venous system do?

The venous system is responsible for returning deoxygenated blood from the tissues back to the heart. It transports this blood through a network of veins, which have valves to prevent the backflow of blood. The venous system also plays a role in regulating blood volume and pressure in the body.


How does venous pressure rise during 2nd heart sound?

The venous pressure increases during the second heart sound because of the increased negative pressure. 2nd heart sound heard when AV valves close,ventricular diastole


What are the three major part of your circulatory system?

Very simply put the venous system, the arterial system and your heart. The venous system bring blood from your organs and extremities to your heart, which pumps it and the arterial system takes it from your heart to your organs and extremities.


The most important force in venous flow is?

pressure generated by the heart