Chapter 19 Flashcards
What’s another word for the right atrioventricular(AV) valve ?
Tricuspid valve
What is the left atrioventricular(AV) valve also known as ?
Mitral valve, Bicuspid valve
What’s tachycardia ?
A persistent, resting adult heart rate (HR) above 100bpm.
What’s bradycardia ?
A persistent, resting adult heart rate under 60bpm.
What is the term for factors outside the heart itself that raise the heart rate ?
Positive chronotropic agents
What is the term for factors outside the heart itself that lower the heart rate ?
Negative chronotropic agents
What is the heart ?
The muscular pump that keeps blood flowing through the blood vessels
What does the pulmonary circuit do ?
Carry blood to the lungs for gas exchange and return it back to the heart
What does the systemic circuit do ?
Supply blood to every organ of the body including other parts of the lungs and the wall of the heart itself
Which side of the heart supplies the systemic circuit ?
The left side of the heart
From which view of the heart is the left atrium visible ?
Posterior view
How can you tell when you’re looking at the anterior view of the heart ?
You can clearly see the left and right auricles, the ligamentum arteriosum, and the pulmonary trunk
How can you tell when you’re looking at the posterior view of the heart ?
You can see the coronary sinus and the left atrium
Where does blood first enter the heart ?
Through the right atrium from the inferior and superior vena cava
What is the second step of blood flow into the heart ?
The blood in the right atrium flows through the right AV valve into the right ventricle
Once the right ventricle contracts, which valve opens ?
The pulmonary valve
After the right ventricle contracts, where does the blood go ?
Through the pulmonary valve and into the pulmonary trunk
Once the blood exits the pulmonary trunk, where does it go ?
To the lungs to unload carbon dioxide and load oxygen
By which vessels does blood return from the lungs ?
Through the pulmonary veins into the left atrium
Where does blood go after the left atrium ?
Through the left AV valve into the left ventricle
What does contraction of the left ventricle do ?
Forces the aortic valve open & the blood flows through the aortic valve into ascending aorta
Where does the blood in the aorta go ?
It supplies every organ in the body where it unloads oxygen and loads carbon dioxide
After going through the systemic circuit, how does the blood return to the heart ?
Through the venae cavae
