02/12 Flashcards
Blood pressure is the
Force blood is exerting on blood vessel walls
What is the factor that propels blood throughout the body?
Blood pressure
Blood moves from
Higher to lower pressure
What has the greatest blood pressure?
Aorta
What has the poorest blood pressure?
Veins
What is the order for blood pressure?
- Aorta
- Arterioles / Artery
- Capillaries
- Veins
The Systolic number communicates the
Number regarding the maximum force exerted on artery when ventricles contract
What’s a normal Systolic reading?
120
The Diastolic number communicates the
Number when the artery no longer contracts
What’s a normal Diastolic reading?
80
What is the pulse pressure?
Difference between systolic and diastolic measurement
Capillaries lack
Tunica Media + Tunica Externa
Velocity is slowest in
The capillaries
Veins have adaptations to deal with
The returning blood back to the heart in lower pressure
The diameter of the vessel facilitates the
Flow of blood
An increased diameter results in the
Increase in flow
What happens in the Skeletal Muscle Pump?
Muscle contracts, squeezing vein and increasing pressure in that vessel and moving blood up to heart
What happens in the Respiratory Pump?
The act of breathing moves blood through the system
Varicose Veins are caused by
Incompetent valves in veins, allowing for the pooling of blood
Resistance is affected by:
- Blood viscosity
- Blood Vessel Length
- Blood Vessel Diameter
A longer blood vessel has
Increased resistance
A wide diameter has
Decreased resistance
Blood vessel diameter changes are due to
Changes in the arterioles
What is Resistance?
The friction created between the blood and blood vessel walls as the blood is moving through
