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What is cardiac preload?
it is the amount of blood available for the heart to pump when the ventricles contract
What is the function of a cardiac cell?
Cardiac cells are muscle cells that make up the heart (cardiac tissues). When the muscles contract, they force blood out of the ventricles of the heart.
What is the term that refers to the portion of the cardiac cycle when the ventricles contract and eject blood from the heart?
Systolic pressure
What are the three distinct stages of Cardiac Cycle?
The three distinct stages of the Cardiac Cycle are diastole, isovolumetric contraction, and systole. During diastole, the heart relaxes and fills with blood. In isovolumetric contraction, the ventricles start to contract but there is no change in volume. Systole is when the ventricles fully contract to pump blood out of the heart.
What type of muscle tissue has a gap junction?
Cardiac muscle tissue has gap junctions to allow impulses to travel quickly though the tissue so the two atria can contract as one and the two ventricles can contract as one.
Which is the phase of cardiac cycle in whitch the auricles contract?
The phase of the cardiac cycle in which the atria contract is called atrial systole. This occurs during the P wave on an ECG and helps to push blood from the atria into the ventricles.
When do the atria contact?
The atria contract during the cardiac cycle's atrial systole phase, which occurs just before the ventricles contract. This contraction helps push blood from the atria into the ventricles, completing the filling of the ventricles before they contract during ventricular systole. Atrial contraction is facilitated by electrical signals from the sinoatrial (SA) node, ensuring synchronized heart function.
What are the 5 phases of the cardiac cycle?
The cardiac cycle consists of five phases: 1) Atrial Systole, where the atria contract to fill the ventricles with blood; 2) Ventricular Systole, during which the ventricles contract to pump blood into the aorta and pulmonary artery; 3) Isovolumetric Contraction, where the ventricles contract without changing volume as the valves close; 4) Ventricular Diastole, when the ventricles relax and fill with blood; and 5) Atrial Diastole, where the atria relax and fill with blood returning from the body and lungs. This cycle ensures efficient blood circulation throughout the body.
What is the phase in the cardiac cycle in which the ventricles relax between contractions?
The ventricles relax during diastole.
What muscles are The only muscles in the heart and makes up the atria and ventricles?
Cardiac Muscle or myocardium are the muscle that make up the heart that contract and relax to pump blood.
What happens when ventricales contracts?
When the ventricles contract, they pump blood out of the heart and into the arteries for circulation throughout the body. This contraction is part of the cardiac cycle and is responsible for the main pumping action of the heart.
Vein that drains most of anterior ventricles?
small cardiac vein
