Podcast
Questions and Answers
What is the primary function of veins?
What is the primary function of veins?
- Deliver oxygen-rich blood to the body
- Return blood to the heart (correct)
- Remove waste from the body
- Pump blood to the lungs
Arteries have thicker walls than veins.
Arteries have thicker walls than veins.
True (A)
What structures in the heart prevent backflow of blood?
What structures in the heart prevent backflow of blood?
Valves
The process of __________ involves the widening of blood vessels, which increases blood flow.
The process of __________ involves the widening of blood vessels, which increases blood flow.
Match the following heart chambers with their functions:
Match the following heart chambers with their functions:
What is the primary function of the circulatory system?
What is the primary function of the circulatory system?
Arteries have a wider lumen than veins.
Arteries have a wider lumen than veins.
What builds up in the inner layer of arteries, leading to atherosclerosis?
What builds up in the inner layer of arteries, leading to atherosclerosis?
Capillaries are __________ cell layers thick.
Capillaries are __________ cell layers thick.
Match the following types of circulatory systems with their functions:
Match the following types of circulatory systems with their functions:
Flashcards
Arteries
Arteries
Blood vessels that carry blood away from the heart, with thinner walls and wider lumen.
Veins
Veins
Blood vessels that return blood to the heart, with valves to prevent backflow and lower pressure.
Vasoconstriction
Vasoconstriction
The narrowing of blood vessels that decreases blood flow.
Atrium
Atrium
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Pericardium
Pericardium
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Function of Circulatory System
Function of Circulatory System
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Pulmonary Circulatory System
Pulmonary Circulatory System
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Capillaries
Capillaries
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Atherosclerosis
Atherosclerosis
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Study Notes
Chapter 10 - Circulatory System
- Cardiovascular System: Heart, Blood Vessels
- Lymphatic System: Lymph Vessels, Nodes
- Circulatory System: Transportation (gases, nutrients, wastes) Regulation (hormones) Protection/Defense (immunity, injury)
Pulmonary Circulation
- Arteries: Blood vessels carrying high pressure blood away from heart
- Thick walls: to maintain blood pressure
- Pulse: Change in diameter of artery when blood flows through
- Bulged weak artery wall = aneurysm: not dealt with
- Too much fat (High LDL) -> build up in endothelium (inner layer) -> fibrous growths
- of calcium/other minerals build up on lipids -> plaque (atheroma)
- Blood package = atherosclerosis
- (thrombosis) reducing oxygen/nutrients delivery to tissues. Cause heart attacks (in coronary arteries) or stroke/dot breaks
- Embolization to brain blood vessels
Systemic Circulation
- Veins and Venules: Blood vessels, return blood to heart
- Not high pressure:
- 4-way valves: prevent blood from flowing in wrong direction, increasing pressure in veins
- Skeletal Muscles: push blood to heart (contract, increasing pressure)
- Older age = elasticity in veins: Over time, blood can pool in vein -> damaging valves (varicose veins)
Heart
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Heart pumps: circulating blood throughout body
-
Pericardium: Fluid-filled membrane that surrounds heart; reduces friction
-
Chambers of heart:
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2 Atria (left/right atrium): Thin walled chambers that get blood from veins
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2 Ventricles (right/left): Thick walled chambers gives blood to arteries
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Septum: Wall of muscle separates left/right side of heart
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Valves:
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Atrioventricular (AV Valves)
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Separates atria from ventricles
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Prevents blood flow back to atria
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Right tricuspid valve
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Left bicuspid/mitral valve
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Supported by bands of connective tissue; chordae tendinae
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