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29 Cards in this Set

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Anatomy 2:Exam 1: Circulatory system Heart.

circulatory system heart.
what 3 thigns does the circulatory system consists of?
heart, blood vessels and blood.
what 2 things does the cardiovascular system refer to?
blood vessels and the heart.
What does the pulmonary circuit do?
brings blood to and from the lungs to the heart. for gas exchange.
what does the systemic circuit do?
brings blood to and from all organs of the body.
which side of the heart supplies the pulmonary circuit?
the right.
which side of the heart supplies the systemic circuit?
the left.
which cavity is the heart located in?
the thoracic cavity in the mediastinum.
what is the mediastinum?
the location of the heart in the thoracic cavity.
what are the dimensions of the heart in inches?
widexlongxthick 4x5x6
how much does the heart weigh?
less than 1 lb.
what is the pericardium?
a double walled sac containing the heart.
what layer is superficial on the pericardium?
parietal pericardium
what layer is deep on the pericardium?
visceral pericardium equiv to the epicardium.
what is between the parietal pericardium and the visceral pericardium?
the pericardial cavity.
is the pericardial sac anchored to diaphram?
yes.
what type of fluid does the pericardial cavity contain? how much?
5 to 30ml of pericardial fluid.
does the serious layer of the pericardiac sac exude pericardial fluid?
yes.
what does pericardial fluid do?
lubricates the membranes of the heart.
what does the disease pericarditis do?
inflames the pericardium so that each heartbeat is less lubricated and painful.
what does the prefix peri mean?
around.

Formula for cardiac output CO=

CO=Stroke Volume x Heart rate

what is avg resting heart rate?

75bpm

what is average resting CO

5.25 L/min

What is max CO?

21 L/min to 35L/min

What is cardiac reserve CR?

difference of resting CO and max CO.

What affects stroke volume SV?

CVP = Central venus pressure.


CTR = Contractility


What affects CVP (central venus pressure)

VC = Venus compliance


BV = Blood volume.

can stroke volume be affected by preload, contractility and afterload?

yes.