Question

Lungs are__________ and spongy due to blood capillaries filled with blood.
We feel _________ in our muscles due to anaerobic respiration.

Answer 1

Answer:

Hii mate

here is ur answer

The oxygen you breathe in goes into your lungs and passes ... the thin lining of the air sacs and into the blood vessels. ... We breathe without having to think about it.

Answer 2

Answer: 1) thin

2) pumping of oxygen

Hope this helps✌️