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Terms in this set (61)
List the layers of the hart wall and heart surround
What type of blood vessel carries blood away from the head? Towards the heart?
Why type of vessels Carries deoxygenated blood and Oxygenated blood? What are the exceptions?
Veins and arteries
Veins carry deoxygenated blood and arteries carry oxygenated blood away from the heart.
What do the sounds in the "Lub-dub" sequence mean? (What are you hearing?)
The Lub-dub sequence is the heart contracting blood to right to left. You are hearing the heart beating.
What are the chordae tendinae, and what do they do?
The chordae tendinae are the heart strings. They help the atrioventricular valves pump blood in the heart.
List the layers of the blood vessel walls. Which type has the thickest walls and thinnest?
Tunica intima, tunica externa, and tunica media
Layers of the heart
Epicardium, myocardium, endocardium
Parietal pericardium (side)
Visceral pericardium (inside)
Fluid between heat and sac
Meds will make you pee
Sequence: lub-dub (pause) lub-dub (pause)
Is caused by the closing of the AV values (beginning of systole)
Louder and longer than dub
Is caused by the closing of semilunar valves (end of systole)
Sound is short and sharp
Inferior/superior vena cava
Abnormal heart sounds created by an obstructed flow of blood through heart
Flow becomes turbulent and makes unusual sounds as hits obstruction
Can be heard on stethoscope
Common in young children with healthy hearts b/c heart walls are thin and vibrate with rushing blood
Valve that doesn't close tightly
Hear swishing sound after valve has supposedly closed
Blood flows back through partially open valve
Hear noises caused by caused by blood flowing turbulently through valve
Carry blood that nourishes and oxygenates heart
-branches from base of aorta and encircle heart in
Types of circulation
systemic, pulmonary, coronary
Drain blood from the maycardium
Empty into coronary sinus
Coronary sinus empties into right atrium
Arterial pulse, blood pressure, breathing rate, and temperature
Used to indicate the efficiency of your circulatory system
Expansion and recoil of the artery when left ventricle contracts
-pulse rate normally equally heart rate (normal: 70-76 bpm)
-pressure points can compress these area during hemorrhage to stop blood loss
Force blood exerts n the inner walls of blood vessel
-keep blood circulating in between heart beats
-closer to heart= higher pressure
Measuring blood vessels
Blood pressure rises and falls with each heartbeat
2 arterial measurement
Pressure in the arteries at peak of ventricular contraction
Pressure when ventricles are relaxing
Reported ion mmHg with systolic pressure written first
Low blood pressure; associated with long life and old age free of illness ,ay hint at malnutrition and inadequate levels of blood pressure
Strains heat and damages arteries, heat is forced to pump against increased resistance so it works harder, causes myocardium to get bigger, can accelerate atherosclerosis; High blood pressure
Amount of blood pumped out by each side of the heart (e.i. Ventricles) in 1 minute
Number of times heart beats per minute (average 75 beats per minute)
Volume of blood pumped by a ventricle with each heart
CO= HR x SV
Cardiac muscle cells are myo genetic
1) atrial cells beat about 60x per minute
2) ventricular cells about 20-40x per minute
Must have some unifying control? Why?
Intrinsic conduction system
sinoatrial node (SA)
Located in right atrium (conductor)
Pacemaker of heart- highest rate of depolarization in entire heart
Sets pace for beating heart tissue
atriventricular node (AV)
Across from SA node
Atrioventricular (AV) bundle (bundle of his) and bundle branches
Located in inter ventricular septum
Spread within muscle of ventricle walls
Order of Nodal system
SA, AV, bundle of his, bundle branches, purkinje fibers
Damages to AV node can release ventricles from control by SA node and ventricle begins to contact at their own rate (slower)
Rapid uncoordinated shuddering of heart muscle (defibrillation)
Rapid heart rate (>100 bpm)
Prolonged tachycardia lead to fibrillation
Slow heart rate (<60 bpm)
Automatic External Defiberlate
Lines the lumen (interior of vessel)
Squamous epithelial cells
Decreases friction as blood flows through lumen
Mostly smooth muscle (involuntary) and elastic tissue
Smooth muscle controlled by sympathetic nervous system
changes diameter of lumen to change blood pressure
Composed of fibrous connective tissue
Functions in support and protection of vessel
Movement of blood veins
Lumens are larger than in arteries
Contains valves to prevents back flow of blood
Skeletal muscles surrounding veined contract and relax, forcing blood through veins against gravity
Varicose veins (spider veins)
When venous valves weaken and blood is allowed to leak through valve
Coronary artery disease
Cause by buildup of fatty,calcified deposits that roughness vessel walls and encourage thrombus formation
Where does gas exchange take place?
What is the only vein that carries oxygenated blood?
Which layer of the heart is the muscle layer?
What are the three types of circulation in the body?
Systemic, pulmonary, coronary
What is the average blood pressure?
What do you measure blood pressure with?
What is the most outer layer of the heart called?
What is a layer of a blood vessel called?
How would blood flow if a vein was cut?
Trickle, slow flow
What separates the ventricle from each other?
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