Solved Unit 20: Anatomy of the Heart Worksheet 1. a j m | Chegg.com - Free Printable

Task: Label the parts of the heart in the provided diagram.

#### Solution:

The diagram shows a cross-section of the human heart, and we need to identify and label each part correctly. Below is the explanation and labeling for each part:

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#### Left Side of the Heart (Blue Region):
1. a. Pulmonary Trunk: The large vessel that carries deoxygenated blood from the right ventricle to the lungs.
2. b. Pulmonary Artery: Branches off the pulmonary trunk, carrying deoxygenated blood to the lungs.
3. c. Superior Vena Cava: A large vein that returns deoxygenated blood from the upper body to the right atrium.
4. d. Right Atrium: The chamber of the heart that receives deoxygenated blood from the body via the vena cavae.
5. e. Interventricular Septum: The thick muscular wall that separates the left and right ventricles.
6. f. Tricuspid Valve: Located between the right atrium and the right ventricle, allowing blood to flow from the atrium to the ventricle and preventing backflow.
7. g. Right Ventricle: The chamber of the heart that pumps deoxygenated blood into the pulmonary trunk.
8. h. Inferior Vena Cava: A large vein that returns deoxygenated blood from the lower body to the right atrium.

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#### Right Side of the Heart (Red Region):
9. i. Aorta: The main artery that carries oxygenated blood from the left ventricle to the body.
10. j. Pulmonary Veins: Carry oxygenated blood from the lungs to the left atrium.
11. k. Left Atrium: The chamber of the heart that receives oxygenated blood from the lungs via the pulmonary veins.
12. l. Mitral (Bicuspid) Valve: Located between the left atrium and the left ventricle, allowing blood to flow from the atrium to the ventricle and preventing backflow.
13. m. Left Ventricle: The chamber of the heart that pumps oxygenated blood into the aorta.
14. n. Chordae Tendineae: Cord-like structures that attach the mitral valve to the papillary muscles, preventing the valve from being pushed back into the atrium during ventricular contraction.
15. o. Papillary Muscles: Muscles within the ventricles that anchor the chordae tendineae to the mitral valve.
16. p. Endocardium: The inner lining of the heart chambers and valves.

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Final Labels:

- a. Pulmonary Trunk
- b. Pulmonary Artery
- c. Superior Vena Cava
- d. Right Atrium
- e. Interventricular Septum
- f. Tricuspid Valve
- g. Right Ventricle
- h. Inferior Vena Cava
- i. Aorta
- j. Pulmonary Veins
- k. Left Atrium
- l. Mitral (Bicuspid) Valve
- m. Left Ventricle
- n. Chordae Tendineae
- o. Papillary Muscles
- p. Endocardium

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Explanation:

The heart is divided into four chambers: two atria (right and left) and two ventricles (right and left). The right side of the heart (blue region) handles deoxygenated blood, which is sent to the lungs for oxygenation. The left side of the heart (red region) handles oxygenated blood, which is pumped out to the rest of the body. Valves ensure unidirectional blood flow, and the muscular walls of the ventricles generate the force needed to pump blood effectively.

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Final Answer:
\boxed{
\begin{aligned}
&\text{a. Pulmonary Trunk} \\
&\text{b. Pulmonary Artery} \\
&\text{c. Superior Vena Cava} \\
&\text{d. Right Atrium} \\
&\text{e. Interventricular Septum} \\
&\text{f. Tricuspid Valve} \\
&\text{g. Right Ventricle} \\
&\text{h. Inferior Vena Cava} \\
&\text{i. Aorta} \\
&\text{j. Pulmonary Veins} \\
&\text{k. Left Atrium} \\
&\text{l. Mitral (Bicuspid) Valve} \\
&\text{m. Left Ventricle} \\
&\text{n. Chordae Tendineae} \\
&\text{o. Papillary Muscles} \\
&\text{p. Endocardium}
\end{aligned}
}