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cardiovascular system shayne soto p.4 (Major Functions ((consists of…
cardiovascular system
shayne soto p.4
Major Functions
consists of heart & blood vessels (arteries, capillaries, veins)
FUNCTION
: vital for supplying oxygen and nutrients to tissues and removing wastes from them
systemic circuit sends oxygenated blood to all body cells
Deoxygenated blood is carried by the pulmonary circuit to the lungs
Blood Flow
SVC
RA
TV
RV
PV
LPA/RPA
Lungs
1 more item...
Anatomy of the heart
Atria
collect blood
Ventricles
deliver blood to body and lungs
Valves
Tricuspid
separates right Atria and Ventricle
Aortic
sends blood to body instead of backwards
Bicuspid
separates left Atria and Ventricle
Pulmonic
sends blood to lungs instead of backward
Structure
PERICARDIUM
types of pericardium
Visceral pericardium
• Innermost layer
• Directly on the heart
Parietal pericardium
(epicardium)
• Layer on top of the visceral
pericardium
EPICARDIUM
• Outermost layer
• Fat to cushion heart
protect and support from surrounding structure and invasion of foreign organisms
MYOCARDIUM
• Middle layer
• Primarily cardiac muscle
muscle portion; to pump blood from heart to the lungs and to systemic circulation
ENDOCARDIUM
• Innermost layer
• Thin and smooth
• Stretches as the heart pumps
one way flow of blood through the
Blood vessels
Capillaries
site of gas exchange
thinner layers
regulate blood pressure
dispurse nutrients and send waste to kidneys
Arterioles
tunica media
in between arteries and veins
tunica externa
tunica intima
Venules
tunica externa
between veins and arteries
tunica media
tunica intima
Veins
less elastic
thicker external tunica and larger lumen
branchial vein
brachial vein
carry blood to heart
subclavian vein
pressure is 1/12 of artery pressure
Arteries
more elastic
have thicker tunica and narrower lumen
carry blood away from heart
Muscular Arties
subclavian
clavicle
FPB
phlanges (fingers)
radial
radius
brachial
humorous
less elastic more muscular
thicker
Cardiac Cycle
T Wave
Ventricles repolarize then relax
0.6 (msec)
QRS
S
Atrial repolarization
Q
interventicular septium deplorizes
R
most of ventricles are deplorized
P-Q
0.2 miliseconds for signals to travel between SA to AV node
P Wave
100 milaseconds later
Atrial Contraction
Ventricles are filled when Atrias contract
S-T
ventricles contract to push blood to Arota
entricular plateau
diseases
High blood pressure
A condition in which the force of the blood against the artery walls is too high.
Cardiac arrest
Sudden, unexpected loss of heart function, breathing, and consciousness.
Congestive heart failure
A chronic condition in which the heart doesn't pump blood as well as it should.
Arrhythmia
Improper beating of the heart, whether irregular, too fast, or too slow.
Peripheral artery disease
A circulatory condition in which narrowed blood vessels reduce blood flow to the limbs.
Stroke
Damage to the brain from interruption of its blood supply.
Congenital heart disease
An abnormality in the heart that develops before birth.