1) Starting from deoxygenated blood returning to the heart,place the following steps in order as blood passes through theheart:
    -     1.    2.     3.    4.     5.    6.     7.     Â
blood passes through the tricuspid valve  Â
blood exits the left ventricle via the aortic valve
oxygenated blood enters the heart via the pulmonary veins
blood is carried to the body via the aorta
blood passes from the left atrium into the left ventricle
blood enters the right atrium
blood leaves the right ventricle through the pulmonary valve
2)
Which of the following is correct regarding the cardiovascularsystem?
| | the aorta is where oxygen-rich blood leaves the heart for thelungs. |
| | pulmonary veins carry oxygen-poor blood. |
| | pulmonary arteries carry oxygen-poor blood. |
| | blood in the pulmonary circuit goes to the brain only |
3)
The main difference between the pulmonary circuit and thesystemic circuit of the heart is that in the pulmonary circuit:
| | oxygen-rich blood leaves the heart for the lungs. |
| | pulmonary veins carry oxygen-poor blood. |
| | pulmonary arteries carry oxygen-poor blood. |
| | blood in the pulmonary circuit goes to the brain only |
