lluminate the Truth Heart Valves Highlight the correct word or phrase in each of the following sentences. 1. (Nerve impulses) (Pressure changes within the heart) trigger the opening and closing of the heart's valves. 2. A heart valve that fails to prevent the backflow of blood during contraction is called (incompetent) (stenotic), and the condition it causes is called valvular insufficiency. 3. (Valvular stenosis) (Regurgitation) is a condition resulting when a heart valve becomes narrowed, such as from scar tissue. 4. The mitral valve consists of (three) (rwo) cusps or leaflets. 5. The pulmonary and aortic valves are also called (semilunar) (tricuspid) valves. 6. The valves regulating flow between the atria and the ventricles are called (atrioventricular) (semilunar) valves. 7. The semi-rigid, fibrous connective tissue encircling each valve is called the (skeleton) (epicardium) of the heart. 8. Tendinous cords called chordae tendinecae work to (pull the valves open when the heart contracts) (keep the tricuspid valve from inverting during ventricular contraction). Drawing Conclusions Heart Sounds When heart valves close, they produce vibrations that can be heard with a stethoscope on the body's surface. In the following figure, identify the areas where each valve can be heard by coloring the circles as suggested; then fill in the name of each valve. • Pulmonic area: Blue • Mitral area: Yellow • Tricuspid area: Green • Aortic area: Orange 188 Chapter 15 Heart
lluminate the Truth Heart Valves Highlight the correct word or phrase in each of the following sentences. 1. (Nerve impulses) (Pressure changes within the heart) trigger the opening and closing of the heart's valves. 2. A heart valve that fails to prevent the backflow of blood during contraction is called (incompetent) (stenotic), and the condition it causes is called valvular insufficiency. 3. (Valvular stenosis) (Regurgitation) is a condition resulting when a heart valve becomes narrowed, such as from scar tissue. 4. The mitral valve consists of (three) (rwo) cusps or leaflets. 5. The pulmonary and aortic valves are also called (semilunar) (tricuspid) valves. 6. The valves regulating flow between the atria and the ventricles are called (atrioventricular) (semilunar) valves. 7. The semi-rigid, fibrous connective tissue encircling each valve is called the (skeleton) (epicardium) of the heart. 8. Tendinous cords called chordae tendinecae work to (pull the valves open when the heart contracts) (keep the tricuspid valve from inverting during ventricular contraction). Drawing Conclusions Heart Sounds When heart valves close, they produce vibrations that can be heard with a stethoscope on the body's surface. In the following figure, identify the areas where each valve can be heard by coloring the circles as suggested; then fill in the name of each valve. • Pulmonic area: Blue • Mitral area: Yellow • Tricuspid area: Green • Aortic area: Orange 188 Chapter 15 Heart
Chapter11: Administration Of Nonparenteral Medications
Section: Chapter Questions
Problem 20RQ
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Transcribed Image Text:lluminate the Truth Heart Valves
Highlight the correct word or phrase in each of the following sentences.
1. (Nerve impulses) (Pressure changes within the heart) trigger the opening and closing of the heart's valves.
2. A heart valve that fails to prevent the backflow of blood during contraction is called (incompetent) (stenotic),
and the condition it causes is called valvular insufficiency.
3. (Valvular stenosis) (Regurgitation) is a condition resulting when a heart valve becomes narrowed, such as from
scar tissue.
4. The mitral valve consists of (three) (rwo) cusps or leaflets.
5. The pulmonary and aortic valves are also called (semilunar) (tricuspid) valves.
6. The valves regulating flow between the atria and the ventricles are called (atrioventricular) (semilunar) valves.
7. The semi-rigid, fibrous connective tissue encircling each valve is called the (skeleton) (epicardium) of the heart.
8. Tendinous cords called chordae tendinecae work to (pull the valves open when the heart contracts) (keep the
tricuspid valve from inverting during ventricular contraction).
Drawing Conclusions Heart Sounds
When heart valves close, they produce vibrations that can be heard with a stethoscope on the body's surface. In the
following figure, identify the areas where cach valve can be heard by coloring the circles as suggested; then fill in
the name of each valve.
• Pulmonic arca: Blue
• Mitral area: Yellow
• Tricuspid area: Green . Aortic area: Orange
188 Chapter 15 Heart
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Introduction
The organ known as the heart is responsible for pumping blood throughout the body. It can be a simple tube, like in annelid worms or spiders, or it can be a more complex structure, like in mollusks, with one or more receiving chambers (atria) and a primary pumping chamber (ventricle).
The human heart, similar to the hearts of other mammals and birds, is a double-pumping, four-chambered structure that serves as the center of the circulatory system. In humans, it is located behind the breastbone, somewhat to the left of the center, between the two lungs, and it is supported by the diaphragm, which is the muscular wall that separates the chest cavity from the abdominal cavity.
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