Thorax Lab 2 Module 1

SECTRA TABLE WORK: Page 4 of 6

Now we will build the components of the left side of the heart.

	Add the posterior view of the left atrium.
	Add the pulmonary veins entering the left atrium.
	Rotate to an anterior view and add the interatrial septum.
	Add the mitral or left atrioventricular valve.

	Why is this valve called the "mitral" valve? What is another name for this valve?
The mitral valve is named for its similarity to a Catholic bishop’s miter (a ceremonial hat with two pointed flaps). The mitral valve has two leaflets (cusps), giving it a similar shape to the miter. It is also known as the bicuspid valve because of its two cusps.

	Add the aortic valve. To see this structure, you must first remove the "brown colored" left ventricle . This "brown colored" object will have to be removed in the next steps to see the valvular structures.
	Add the interventricular septum, and rotate the model to observe the spatial relationship between the mitral and aortic valves and the ventricular septum.
	Add the ascending aorta.

Tap on image to enlarge

Trace the flow of oxygenated blood from the pulmonary veins, through the mitral valve, into the left ventricle, and out through the aortic valve to the aorta.

Spend additional time reviewing this flow using the heart models on the demonstration table to reinforce your understanding.