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Questions and Answers
What type of tissue forms the atrio-ventricular septum?
What type of tissue forms the atrio-ventricular septum?
Which valve guards the opening between the left ventricle and the aorta?
Which valve guards the opening between the left ventricle and the aorta?
What is the function of the valves in the heart?
What is the function of the valves in the heart?
Which of the following is NOT separated by a septum?
Which of the following is NOT separated by a septum?
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What is the name of the membranous bag that encloses the heart?
What is the name of the membranous bag that encloses the heart?
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Flashcards
Circulatory System
Circulatory System
The human circulatory system includes the heart, blood vessels, and blood.
Heart
Heart
A muscular organ in the thoracic cavity that pumps blood.
Chambers of the Heart
Chambers of the Heart
The heart has four chambers: two atria and two ventricles.
Heart Valves
Heart Valves
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Septum
Septum
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Study Notes
Human Circulatory System
- The circulatory system, also known as the blood vascular system, comprises the heart, blood vessels, and blood.
Heart Structure
- The heart is a mesodermally-derived, muscular organ located in the thoracic cavity, between the lungs, slightly angled to the left.
- It has a fist-sized dimension and is encased in a protective, double-walled sac called the pericardium, containing pericardial fluid.
- The heart has four chambers: two atria (smaller upper chambers) and two ventricles (larger lower chambers).
- The atria and ventricles on the same side of the heart are separated by a septum.
- Interatrial septum: separates the right and left atria (thin)
- Interventricular septum: separates the right and left ventricles (thick)
- Atrioventricular septum: a thick fibrous tissue between atria and ventricles on the same side.
- Each septum has an opening connecting the corresponding chambers.
- Valves govern blood flow direction.
- Tricuspid valve: three cusps, guards the opening between the right atrium and right ventricle.
- Bicuspid or mitral valve: two cusps, guards the opening between the left atrium and left ventricle.
- Semilunar valves: located at the openings of the pulmonary artery (right ventricle) and aorta (left ventricle). They ensure one-way blood flow from the ventricles to the arteries preventing backflow.
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Description
Test your knowledge about the human circulatory system, including the structure of the heart and its various components. This quiz covers the heart's anatomy, including its chambers, septa, and valves. Dive into the functions and features that keep our blood flowing!
