blood flow and gas exchange

Question 1

Oxygen-poor blood from all over your body enters your ________ through two large veins, your _________________and _________________.

Answer 1

right atrium, inferior vena cava, superior vena cava

Question 2

Blood flows through your _________________to your __________, where it gets oxygen.

Answer 2

pulmonary artery , lungs

Question 3

Oxygen-rich blood travels from your lungs to your ______________ through large veins called _________________.

Answer 3

left atrium, pulmonary veins

Question 4

Your heart sends blood through your _____________to your _________, where it flows to the rest of your body.

Answer 4

aortic valve , aorta