Please enable JavaScript.
Coggle requires JavaScript to display documents.
Cardiovascular System (Cardiac Muscle Contraction (calcium enters,…
Cardiovascular System
Cardiac Muscle Contraction
pacemakers start electrical impulses
calcium enters, depolarization
potassium leaves, repolarization
refractory period is longer
allows time for muscle to relax
heart rate doesn't slow down almost immediately
striated
multi-nuclei
branches out
has more mitochondria than skeletal
so it doesn't fatigue or else we die
skeletal are separate, cardiac are always connected together
Cardiac Cycle
P Wave
Atrial Contraction
Ventricles are filled when Atrias contract
100 milaseconds later
P-Q
0.2 miliseconds for signals to travel between SA to AV node
QRS
Q
interventicular septium deplorizes
R
most of ventricles are deplorized
S
Atrial repolarization
S-T
ventricles contract to push blood to Arota
entricular plateau
T Wave
Ventricles repolarize then relax
0.6 (msec)
Blood Vessels
Arteries
carry blood away from heart
Muscular Arties
subclavian
clavicle
radial
radius
FPB
phlanges (fingers)
brachial
humorous
less elastic more muscular
thicker
have thicker tunica and narrower lumen
more elastic
Veins
carry blood to heart
subclavian vein
brachial vein
branchial vein
pressure is 1/12 of artery pressure
thicker external tunica and larger lumen
less elastic
Capillaries
site of gas exchange
thinner layers
regulate blood pressure
dispurse nutrients and send waste to kidneys
Arterioles
in between arteries and veins
tunica externa
tunica media
tunica intima
Venules
between veins and arteries
tunica externa
tunica media
tunica intima
Anatomy
Atria
collect blood
Ventricles
deliver blood to body and lungs
Valves
Tricuspid
separates right Atria and Ventricle
Bicuspid
separates left Atria and Ventricle
Aortic
sends blood to body instead of backwards
Pulmonic
sends blood to lungs instead of backward
Heart Muscle
Nucleus
Sarcolema
Mitochondria
Sarcomere
I band A band I band
Z disc H zone Z disc
Gap junctions
Sarcoplasmic Recticulum
Electrical Conduction
pacemakers start electric conduction
potassium comes in voltage gated channels
sodium leaves
voluntary
AV nodes have gap junctions
delay for a small period of time for Atrea to contract before Ventricals contract
Fibrillation
no coordinated contraction
AED are reset buttons
send action potentials to all cells