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Questions and Answers
Match the heart chambers with their functions:
Match the heart chambers with their functions:
Right atrium = Receives oxygenated blood from the lungs Right ventricle = Pumps blood from the right atrium to the lungs Left atrium = Receives deoxygenated blood from the body Left ventricle = Pumps blood from the left atrium to the rest of the body
Match the heart valves with their locations:
Match the heart valves with their locations:
Tricuspid valve = Between right atrium and right ventricle Pulmonary valve = Between right ventricle and lungs Mitral valve = Between left atrium and left ventricle Aortic valve = Between left ventricle and the rest of the body
Match the heart wall layers with their descriptions:
Match the heart wall layers with their descriptions:
Epicardium = Thin layer of connective tissue Myocardium = Made up of cardiac muscle cells Endocardium = Thin layer of epithelial tissue lining heart chambers
Match the blood flow paths with their destinations:
Match the blood flow paths with their destinations:
Match the heart functions with their regulators:
Match the heart functions with their regulators:
Match the heart facts with their descriptions:
Match the heart facts with their descriptions:
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Study Notes
Heart Structure
- The heart is a muscular organ that pumps blood throughout the body
- It is divided into four chambers:
- Right atrium (receives deoxygenated blood from the body)
- Right ventricle (pumps blood from the right atrium to the lungs)
- Left atrium (receives oxygenated blood from the lungs)
- Left ventricle (pumps blood from the left atrium to the rest of the body)
Heart Function
- The heart pumps around 2,000 gallons of blood per day
- The heartbeat is regulated by the sinoatrial (SA) node, a group of cells in the right atrium
- The heartbeat is controlled by the autonomic nervous system, which stimulates the heart to beat faster or slower as needed
Blood Flow Through the Heart
- Deoxygenated blood enters the right atrium through the superior and inferior vena cavae
- Blood flows from the right atrium to the right ventricle through the tricuspid valve
- The right ventricle pumps blood through the pulmonary valve to the lungs
- Oxygenated blood returns to the heart through the pulmonary veins and enters the left atrium
- Blood flows from the left atrium to the left ventricle through the mitral valve
- The left ventricle pumps blood through the aortic valve to the rest of the body
Heart Wall Layers
- Epicardium: the outermost layer, a thin layer of connective tissue
- Myocardium: the middle layer, made up of cardiac muscle cells
- Endocardium: the innermost layer, a thin layer of epithelial tissue that lines the heart chambers
Heart Structure
- The heart is a muscular organ that pumps blood throughout the body
- It has four chambers: right atrium, right ventricle, left atrium, and left ventricle
Heart Chamber Functions
- Right atrium receives deoxygenated blood from the body through the superior and inferior vena cavae
- Right ventricle pumps blood from the right atrium to the lungs
- Left atrium receives oxygenated blood from the lungs through the pulmonary veins
- Left ventricle pumps blood from the left atrium to the rest of the body
Heart Function and Regulation
- The heart pumps around 2,000 gallons of blood per day
- The sinoatrial (SA) node, a group of cells in the right atrium, regulates the heartbeat
- The autonomic nervous system controls the heartbeat, stimulating it to beat faster or slower as needed
Blood Flow Pathway
- Deoxygenated blood flows from the body to the right atrium
- Blood flows from the right atrium to the right ventricle through the tricuspid valve
- Blood is pumped from the right ventricle to the lungs through the pulmonary valve
- Oxygenated blood returns from the lungs to the left atrium through the pulmonary veins
- Blood flows from the left atrium to the left ventricle through the mitral valve
- Blood is pumped from the left ventricle to the rest of the body through the aortic valve
Heart Wall Layers
- Epicardium is the outermost layer, a thin layer of connective tissue
- Myocardium is the middle layer, made up of cardiac muscle cells
- Endocardium is the innermost layer, a thin layer of epithelial tissue that lines the heart chambers
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