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Human Biology Chapter 5
Terms in this set (31)
The cardiovascular system is made up of the ________________.
heart and blood vessels
The _________ pumps blood through the body. The blood is always contained in the _____________.
This movement of blood is termed __________, the purpose of which is to service the cells by providing oxygen and nutrients while removing carbon dioxide and other wastes.
This exchange takes place within the ___________ that surrounds the cells.
The cardiovascular system performs four main functions: first, ______________ of the heart generate blood pressure, which moves blood through the _________________.
Second, the blood vessels __________ blood from the heart into arteries, capillaries, and veins. Then, blood returns to the heart to complete the ___________.
Third, gas __________ occurs in the capillaries, where oxygen is dropped off for the cells, and CO₂ and wastes are picked up
Finally, the heart and blood vessels __________ blood flow, according to the needs of the body.
The lymphatic system _________ the cardiovascular system.
Fluid collects in the tissues as ____________ occur between blood and tissue fluid.
The lymphatic vessels __________ excess tissue fluid and return it to the cardiovascular system.
The lymphatic vessels start in the tissues and end at cardiovascular _________ in the shoulders.
Once fluid has entered the lymphatic system, it is known as __________.
Carry blood away from the heart to the capillaries.
Thick muscular walls.
Permit exchange of materials with tissues.
Join arterioles to venules.
May be bypassed by arterioveneous shunts.
Return blood to the heart.
Have valves that regulate the flow of blood.
Blood flow due to skeletal muscle contraction.
The superior vena cava and the inferior vena cava, which carry O₂-poor blood that is relatively high in ___________, enter the right atrium.
The right atrium sends blood through the __________ valve to the right ventricle.
The right ventricle sends blood through the pulmonary _____________ into the pulmonary trunk and through the two pulmonary arteries to the lungs.
_____________ pulmonary veins, which carry O₂-rich blood from the lungs, enter the left atrium.
The left atrium sends blood through the ________________ to the left ventricle.
bicuspid (mitral) valve
The left ventricle sends blood through the aortic semilunar valve into the _________ to the rest of the body.
The rhythmic contraction of the atria and ventricles is due to the intrinsic ___________ system of the heart that is made possible by the presence of nodal tissue, a unique type of cardiac muscle.
Nodal tissue, which has both _________ and nervous characteristics, is located in two regions of the heart.
The ______________ is located in the upper dorsal wall of the right atrium. The ____________ is located in the base of the right atrium very near the septum.
SA (sinoatrial) node
AV (atrioventricular) node
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