Term
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Definition
Carry blood AWAY from Heart
Thickest
3 Layers:
1. Outer Layer: Connective Tissue
2. Middle Layer: Smooth Muscle (regulate the size of arterial lumen - open)
3. Inner Layer: Connective Tissue with endothelial layer |
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Term
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Definition
Carry blood TOWARD the Heart
Thinner than arteries with larger lumen
3 layers but thinner smooth muscle (less rigid for for shape changing during high Pressure)
Have VALVES to prevent back flowing |
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Term
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Definition
Connect Arteries with Veins
-1 layer ONLY - Endothelium - Thinnest
-Blood to tissue: 02, nutrients, hormones
-Tissue to blood: CO2, nitrogenous waste
-Extensive Network - large SA for exchange
-Arterioles release blood to capilaries
-Venules collect blood from the capillaries |
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Term
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Definition
| The only artery in human body that carries deoxygenated blood |
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Term
| Increase in the amount of blood pumped by the heart is affected by: |
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Definition
1. A rise in carbon dioxide content of the blood
2. Hormones
3. Nerves |
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Term
| Sounds of the beating heart are caused by: |
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Definition
a. the closure of the semilunar valuves
2. the closure of the tri and bicuspid valves
3. The contraction of the muscle in the ventricle |
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Term
| The initiation of the heart beat is caused by ____ and the regulation of the rate of contraction is by______ |
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Definition
1. Sinoatrial node
2. Pacemaker |
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Term
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Definition
| Connective tissue sac enclosing the heart |
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Term
| PROPER SEQUENCE OF CARDIAC IMPULSE |
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Definition
| SA node → AV node → AV bundle → Purkinje fibers |
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Term
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Definition
| Period of heart contraction |
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Term
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Definition
| Symptoms of damaged valve |
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Term
| FUNCTIONS OF CIRCULATORY SYSTEM |
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Definition
Transport of nutrients to each cell
Regulates body temperature
Protects body against invading microorganism |
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Term
| Sensory receptors in the walls of the vena cava and right atrium are stimulated when |
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Definition
| Vessels are distended with blood and wall is stretched |
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Term
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Definition
| Result of excess aldosterone secretion and increased sodium intake |
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Term
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Definition
| Heart rate center located in hindbrain |
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Term
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Definition
| Period of ventrical relaxation |
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Term
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Definition
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Term
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Definition
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Term
| The propagation of AP through the atrioventricular node is _____ for approximately 0.1 second |
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Definition
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Term
| The electrical current recorded by an electrocardiograph corresponding to the P waves are from the depolarization of the ____ |
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Definition
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Term
| The Q.R.S complex corresponds to the depolarization of the _______ |
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Definition
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Term
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Definition
| correspond the relaxation of the ventricle |
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Term
| Increased temperature affects the sinoatrial node and the heart rate is _____ |
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Definition
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Term
| Heart rate is increased by |
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Definition
| Epinephrine and thyroxine |
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Term
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Definition
| heart rate x stroke volume |
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Term
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Definition
| The observation that there is a direct proportion between diastolic volume of the heart and force of the following systole |
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Term
T/F
The rhythmic discarhd of the SA Node occurs spontaneously in the complte absence of any nervous or hormonal influences |
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Definition
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Term
T/F
There is no muscular connection between atria and ventricle |
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Definition
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Term
T/F
The atrioventricular node initiates the heart beat |
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Definition
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Term
T/F
The heart muscle is norished by the blood within its chambers |
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Definition
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Term
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Definition
Transfer excess interstitial fluid back to the blood
Return protein to blood |
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Term
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Definition
"hardening of the arteries"
Thickening of the arterial wall with connective tissue and deposits of cholesterol |
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