Circulatory system

Question 1

why is more pressure needed in the systemic circulation

Answer 1

to get blood to the extremities
higher volume of blood
greater resistance to flow

Question 2

what is the largest artery in the body

Answer 2

the aorta
largest diameter
thickest vessel walls

Question 3

how does the aorta branch

Answer 3

right and left subclavian arteries branch off
- travel towards thoracic limbs
carotid arteries
- travel up the neck
- supply blood to head

Question 4

what artery supplies the tail

Answer 4

coccygeal artery

Question 5

what is the function of the brachiocephalic veins

Answer 5

to carry blood to cranial vena cava and back into the heart

Question 6

what is the function of the iliac veins

Answer 6

return blood to caudal vena cava

Question 7

what two ions are responsible for the initial depolarisation of cardiac muscle as they travel from outside of the muscle cell to the inside of the muscle cell?

Answer 7

sodium and calcium

Question 8

majority of exchange of gases and nutrients between blood and tissue take place where

Answer 8

capillary bed

Question 9

oxygenated blood is carried from the mother to a fetus through the

Answer 9

umbilical vein