5.1.8 Heart: overview of external features



Now that we've seen some dissected specimens, let's take a further all-around look at this intact heart, with all its epicardial fat intact. We'll take a second look at all four chambers, in the order in which blood passes through them.

Here's the right atrium, with the superior vena cava entering above, and the inferior vena cava below. Here's the right atrial appendage. Here's the location of the tricuspid valve. Here's the right ventricle: it's almost obscured by fat. Here's the infundibulum. The pulmonary valve is here.

Here's the pulmonary trunk, passing to the left of the aorta, and dividing into the left pulmonary artery, and the right pulmonary artery. Here's the left atrium, with two pulmonary veins entering on the right, and two on the left.

Here's the left atrial appendage. The mitral valve is here. Here's the left ventricle. Its outflow pathway is here, leading to the aorta. Here's the aorta; and the aortic valve is here.

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