Question

Question 5. Impure blood comes back to the heart through _________ blood vessels.

Question 6. The largest artery of blood is called ___________.

Question 7. There is an exchange of _____________ and _____________ gases in the lungs.

Question 8. Blood ____________ protects the body from the germs of disease. ​

Answer 1

Answer:

6th pulmonary artery

7th Co2 and O2

Answer 2

Answer:

1-Veins

2-Aorta

3-CO2 and O2

4-platelets