Blood vessels Flashcards
What is the job of the arteries, and why are the walls thicker than veins?
Transports blood from the heart.
The wall of the artery is thicker with muscles and
elastic tissue because there is a higher pressure in them.
What is the job of the veins?
Transport blood back too the heart
What is the capillaries job?
exchange of substances to the cells because of the short distance.
Where is the majority of the blood?
Veins 75%
How much blood does a guy who is 200 cm high have?
7 liters.
* A male has about 70 ml / kg.
–A 70kg Male: 70kgx70ml= 4800ml, so round 5 liters of blood.
What are the arteries in the arm called from the top?
Subclavian artery
Axillary artery
Brachial artery
Radial artery
Ulnar artery
What are the arteries in the leg called from the top?
Illic artery
Femoral artery
popliteal artery
Dorsalis pedis artery
If its low pressure in the veins, how does the blood get back?
Muskel skeletal pump:
- By using muscles you
help to pump the blood
back.
Veins Valves:
- Due to valves in the
veins the blood doesn ́t
flow backwards.
What is the systolic blood pressure in the:
Foot?
Wrist?
Groin?
Neck?
Foot: 100 mm hg
Wrist: 80 mm hg
Groin: 70 mm hg
Neck: 60 mm hg
Note: Studies have shown it to be unreliable in
estimating systolic blood pressure
What determines the blood pressure?
CO (Cardiac output)
SMR (Systemic vascular resistance)
What determines the cardiac output?
Heart rate
Stroke volume
Heart rate is determined by the amount of times the heart beats in one minute.
Stroke volume is determined by the volume of blood the heart is pumping out in one beat.
What determines the stroke volume?
End diastolic pressure:
”How much is filling the heart”
Venous return
End systolic pressure:
”How much is left when pumped out”
How hard can we make it contract
Regulation of blood pressure.
Where is the circulatory center located?
The circulatory center is located in:
Medulla oblongata
The circulatory center can be affected by the “Fright, fight, flight”, which is a phrase connected to the ……. System?
The “fright, fight, flight” is connected to the sympathetic system
Regulation of the blood pressure is done by stretching in the arterial wall and can be detected by the “baroreceptors”. These receptors is located in:
Carotid Sinus
Aortic arch
