The coronary arteries are branches off the pulmonary...

The coronary arteries are branches off the pulmonary arteries that supply the heart the layers of the heart with blood. A True B False Question 15 1 Point For the heart to contract effectively, the right side of the heart contracts while the left side of the heart fills with blood and then the left side contracts while the right side of the heart fills with blood. A True B False Question 16 1 Point The cardiac conduction system allows for the heart to contract in a very coordinated mechanism that is dependent upon the AV node to generate the electrical impulse. A True Last saved 8:06:29 PM

Transcript

00:01 Not to answer this question, let's talk about the cardiac cycle here, okay? it says put true for true or t for true and f for false in the left hand side.

00:09 It says hard sounds are produced due to the closing of the valve, and this is true.

00:13 I want to place that here, okay? i have more space here.

00:16 And this is true.

00:17 Remember that the heart sounds don't occur because of the opening of the valve, but because of the closure of the valves.

00:25 Option 2 says the duration of systole is more.

00:30 This is false, okay, because remember that diastole is longer than systole, because during diastole is where the heart is going to nourish.

00:41 It is going to get oxygen during diastole.

00:43 So this is why diastole is longer than systole.

00:47 So this is false.

00:48 Then you have question three that says the heart is located below the diaphragm.

00:53 And this is false because the heart is placed in the chest.

00:56 And the chest is everything above the diaphragm.

00:59 This is false.

01:00 Question 4 says the heart has three chambers.

01:03 This is false.

01:03 The heart has four chambers, two atria, the left and the right, and also two ventricles, the left and the right.

01:10 Five says the upper chambers of the heart are called the atria.

01:13 This is two.

01:15 Then you have six that says mitral valve is located between the left atrium and the right ventricle, and this is false.

01:21 If this is your heart chamber, if you have here the guide atrium and here the guide ventricle, this is the tricuspid valve.

01:30 Here and the left ventricle here, this is the mitral valve.

01:34 Then it says, anterior surface of the heart is made mainly by the left ventricle.

01:39 And this is false.

01:40 It is made mainly by the right ventricle.

01:44 H says size of the heart is its owner's fist.

01:50 And this is also true...

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