Flashcards in Chapter 5: Cardiovascular System Deck (74):
What are the organs of the Cardiovascular system?
What is the cardiovascular system divided into?
Between heart and cells of body
In the systemic circulation, how is oxygenated blood carried?
Away from the left side of heart to body
In the systemic circulation, how is deoxygenated blood carried?
From the body to the right side of the heart.
Between Heart and Lungs
In the pulmonary circulation, how is deoxygenated blood carried?
Away from the right side of the heart to lungs
In the pulmonary circulation, how is oxygenated blood carried?
From lungs to the left side of the heart
What happens when the heart contracts?
Blood is ejected from the heart
Pushed throughout body within blood vessels
What is the heart made of?
Cardiac muscle fibers
Where is the heart located?
In the mediastinum directly behind the sternum
Tip of heart at lower edge
What are the 3 layers of the heart?
Inner layer that lines the heart chambers. Smooth, thin layer that reduces friction as the blood passes through heart chambers
Middle layer made of thick muscle.
Contraction of this layer develops the pressure required to pump blood through blood vessels
Outer layer that forms the visceral layer of pericardial sac
Fluid between layers of pericardial sac reduces friction as heart beats
What are the chambers of the heart?
What are the heart chambers divided by?
Left and right upper chambers
blood returns to atria in veins
What veins are in the atria?
Left and right lower chambers
blood exits into arteries
What are the 4 valves of the heart
What are heart valves?
Controls direction of blood flow
Found at exit and entrances of ventricles
Between right atrium and ventricle
Prevents blood in ventricle from flowing back into atrium
How many leaflets/ cusps does the tricuspid valve have
A semilunar valve
Between right ventricle and pulmonary artery
Prevents blood in artery from flowing back into ventricle
Valve looks like half moon
Between left atrium and ventricle
Prevents blood from flowing back into atrium
How many cusps does the Mitral valve have?
has 2 cusps
A semilunar valve
between left ventricle an aorta
Prevents blood in aorta from flowing back into ventricle
What are the 2 large veins in the right atrium?
Superior vena cava
Inferior Vena Cava
Relaxation phase of the heart chambers
Contraction phase of the heart chambers
Sinoatrial node (SA)
What are the 3 types of blood vessels?
channel within blood vessels
Large vessels in which the walls contain smooth muscle and can dilate or constrict
smaller vessels branched from arteries
What carries blood away from the heart?
What do coronary arteries supply?
thin-walled vessels that form capillaries
What carries blood towards the heart?
Measurement of force exerted by blood against walls of a vessel
What characteristics can affect blood pressure?
Volume of blood
Amount of resistance to blood flow
What happens during ventricular systole?
Blood is under great pressure
Give highest pressure
What happens during ventricular diastole
Blood isn't being pushed from the heart
Blood pressure is at the lowest point
pertaining to the aorta
pertaining to an artery
a small artery
pertaining to the atrium
pertaining to the heart
pertaining to the heart
pertaining to between the atria
pertaining to between the ventricles
pertaining to the heart muscle
pertaining to a valve
pertaining to a blood vessel
pertaining to a vein
pertaining to a ventricle
a small vein
inflammation of a vessel
involuntary contraction of smooth muscle in wall of a vessels; narrows the vessel
narrowing of a vessel
a slow heart rate, typically below 60 beats per minute
obstruction of blood vessel by blood clot that has broken off a thrombus in another site
area of necrotic tissue due to loss of blood supply
local and temporary deficiency of blood supply due to a circulatory obstruction
sound, in addition to normal heart sounds; may or may not indicate an abnormality
sudden drop in blood pressure when standing up suddenly
pounding, racing heartbeats
yellow; fatty deposits of lipids in an artery; hallmark of atherosclerosis