Conversation so far:
which side of the body is the lungs
The lungs are a pair of spongy, air-filled organs located on either side of the chest.
What is the weight of human lungs?
The right lung is bigger than the left, which shares space in the chest with the heart. The lungs together weigh approximately 1.3 kilograms, and the right is heavier.
How is lung capacity measured?
Spirometry measures lung function, specifically the amount and/or speed of air that can be inhaled and exhaled.

Question: When do the organs develop?
Self-contained rewrite: When do human lungs develop?