ap2 ex 20 Heart online d (1)
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Crowder College *
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Anatomy
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Apr 3, 2024
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A & P II Heart Parts Lab
Ex. 20 Heart: Lab Manual pages 245-52
1.
Describe the location
of the heart in the body.
-
The heart is located in the middle of your chest, slightly to the left side. It sits behind your sternum (breastbone) and is protected by your rib cage.
2.
Be able to identify the following heart parts on a diagram. Watch this video
to learn to ID these parts: https://www.youtube.com/watch?v=UMTDmP81mG4
Write out the functions of the 14 bold parts. Use this video and your lab manual as a resource.
- R/L atria: These are the upper chambers of the heart responsible for receiving blood. The right atrium receives deoxygenated blood from the body via the superior and inferior vena cava, while the left atrium receives oxygenated blood from the lungs via the pulmonary veins.
- R/L ventricles: These are the lower chambers of the heart responsible for pumping blood out of the heart. The right ventricle pumps deoxygenated blood to the lungs via the pulmonary trunk/arteries, while the left ventricle pumps oxygenated blood to the body via the aorta.
- Myocardium: This is the muscular layer of the heart responsible for its contraction, which enables it to pump blood throughout the body.
- Endocardium: This is the inner lining of the heart chambers and valves, providing a smooth surface
for blood flow and helping to prevent blood clots.
- Visceral pericardium (epicardium): This is the outer layer of the heart wall, providing protection and producing lubricating fluid to reduce friction during heartbeats.
- Tricuspid valve: This valve is located between the right atrium and right ventricle, preventing the backflow of blood from the ventricle to the atrium during ventricular contraction.
- Bicuspid valve: Also known as the mitral valve, this valve is located between the left atrium and left ventricle, preventing the backflow of blood from the ventricle to the atrium during ventricular contraction.
- Superior vena cava: This large vein carries deoxygenated blood from the upper body to the right atrium of the heart.
- Aorta: This is the largest artery in the body, originating from the left ventricle, and it carries oxygenated blood to the systemic circulation.
- Aortic semi-lunar valve: This valve is located between the left ventricle and the aorta, preventing the backflow of blood from the aorta into the ventricle during relaxation.
- Pulmonary trunk/arteries: The pulmonary trunk arises from the right ventricle and divides into the pulmonary arteries, which carry deoxygenated blood from the heart to the lungs for oxygenation.
- Pulmonary semi-lunar valve: This valve is positioned between the right ventricle and the pulmonary trunk, preventing the backflow of blood from the pulmonary trunk into the ventricle during relaxation.
- Pulmonary veins: These veins carry oxygenated blood from the lungs back to the left atrium of the heart, returning it to the systemic circulation.
3.
Locate the following coronary blood vessels using figures 20.1 and 20.2. Be able to ID them on a diagram. Watch this video to learn these parts
:
https://www.youtube.com/watch?
v=7ztPadnA_UM
Coronary Circulation:
-
R/L coronary arteries : These are blood vessels that supply oxygen-rich blood to the heart muscle.
-
Coronary sinus : It's a vein that collects used blood from the heart and returns it to the right atrium.
-
Anterior interventricular artery: It's a blood vessel that provides oxygenated blood to the front of the heart.
-
Circumflex artery: This artery delivers oxygen-rich blood to the side and back of the heart.
-
Circumflex vein: It's a vein that accompanies the circumflex artery, carrying used blood from the
heart.
-
Great cardiac vein: This vein drains used blood from the front of the heart.
4.
Label
the numbered parts on the 3 heart diagrams.
5.
After completing the colorings/labelings, go to this website and practice naming
the heart parts: https://quizlet.com/208216931/anatomy-physiology-the-heart-flash-cards
Use the flashcard segment as a review. Then use the Matching segment as a practice quiz.
6.
Label
the picture of the systemic and pulmonary circuits. Write out the purpose of each circuit
.
7.
Sheep Heart dissection videos. Watch external part1 https://florida.pbslearningmedia.org/resource/d5201c57-3edf-436f-81f7-
ba884b2e0e66/detailed-sheep-heart-dissection-video-part-i/#.Wfu2-2hSyUk
And internal part 2:
https://florida.pbslearningmedia.org/resource/9d6854af-12ef-4b20-bcac-
0c769c6f9337/detailed-sheep-heart-dissection-video-part-ii/?#.Wfu4RGhSyUk
Color and label these interior parts of the heart
1 aorta
2 superior vena cava
3 Pulmonary artery (right)
4 Pulmaonary veins
5 right atrium
6 Tricuspid Valve
7
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