Transcript The Ciculatory System

Formed Elements
(The cells in blood are
called formed elements)
Plasma
(Plasma is mostly water)
1
Composition
Of
Blood
2
Erythrocytes
(RBC’s_)
Leukocytes
(WBC’s)
3
Platelets
4
5
Heart
200mmHg
1
Aorta
2
Artery
120mmHg
3
Arteriole
4
Capillary Bed
50mmHg
Venule
5
Vein
6
Vena Cava
Heart
7
Differences Between Arteries
and Veins
toward
• Veins transport blood _______
from the heart
low pressure vessels
• Veins are _____
valves
• Veins have ______
Normal Blood Pressure
• Systolic Pressure
ventricular contraction
– Maximum pressure during______________
• Diastolic Pressure
ventricular relaxation
– Minimum pressure during _____________
• Textbook Values:
SP
DP
120 mmHg (Systolic)
80 mmHg (Diastolic)
Ruptured blood vessels
in the retina associated
with hypertension
High Blood Pressure
Hypertension = _______________
The Sinoatrial Node (S.A. Node)
What is the function of the atrio-ventricular node?
It is an electrical connection between the atria an the ventricles
with a 7/100 second delay to allow the atria to empty before
the ventricles begin to contract.
Impulse
causes atrial contraction
___________________
Arial contraction is forces the___________________
blood from the atria to flow into the ventricles
The Cardiac Cycle
7/100 second delay does what?
It lets the atria completely empty before the
ventricles begin to contract
QRS complex
QRS – complex
R
P-wave
P-wave
T- wave
QS
Atrial emptying
Ventricular
emptying
Ventricular filling