Question

(d) The lungs have a network of fine blood vessels called
e) A flowing blood stream is vital for our survival as it carries
to all parts of the body.
and​

Answer 1

Answer:

Explanation:

capillaries

Healthy lungs have about 300 million air sacs in them. Each air sac is surrounded by a network of fine blood vessels (capillaries). The oxygen in inhaled air passes across the thin lining of the air sacs and into the blood vessels. This is known as diffusion.

provide oxygen to all parts of body except lungs

Answer 2

Explanation:

artries and veins

cappilaries