Mod 1 - Fundamentals Flashcards
what valve is in between the left atrium and left ventricle
bicuspid/mitral valve
what valve is in between the right atrium and the right ventricle
tricuspid valve
what is the “natural pacemaker”
SA node
give the order of cardiac conduction
- SA node
- AV node
- Bundle of His
- Purkinje fibers
what does SA node & AV node stand for
sinoatrial; atrioventricular
where is the SA node
back wall of right atrium
how many impulses does the SA trigger/min
60-100
where is the AV node
junction of atria & ventricles on right side
where is the bundle of His
between right & left ventricles
give the steps of cardiac contraction
- SA node sends signal
- AV node receives & atrium contract
- Bundle of His receive and impulse branches left & right
- Purkinje fibers receive & ventricles contract
what does blood carry
- nourishment
- vitamins
- electrolytes
- hormones
- antibodies
- warmth
- oxygen
- waste
- proteins
how much blood do adults have
4-6 L
how much of blood is plasma
55-60%
what makes up plasma (give % too)
92% water & 8% other
what is in the 8% of plasma that is not water
- proteins
- glucose
- electrolytes
- fibrinogen
- other
how much of blood are blood cells
40-45%