Respiration and the respiratory system

Question 1 of 10

Gas exchange in the lungs takes place in tiny air sacs called

Question 2 of 10

Lime water turns milky in the presence of

Question 3 of 10

Describe what happens when we breathe in and out.

Question 4 of 10

The windpipe is called the ___.

Question 5 of 10

Distinguish between breathing and respiration.

Question 6 of 10

Alveoli are where oxygen enters the blood.

Question 7 of 10

Breathing and respiration are the same process.

Question 8 of 10

Bread rises because yeast produces

Question 9 of 10

Smoking damages the lungs and can cause

Question 10 of 10

Muscles produce ___ acid during hard exercise without enough oxygen.