First, in the lungs are150 a million alveoli (very large surface area) which mean more oxygen is taken in. <span>Second, of all, the alveoli are covered in capillaries, meaning that gas exchanges happen extraordinarily fast - with each breath.</span>
First of all, humans have their two lungs to breathe, which are covered in over 150 million alveoli, meaning a very, very large surface area, which means more oxygen is taken in.
Second of all, the alveoli are covered in capillaries, meaning that gas exchanges happen extraordinarily fast - with each breath.
So, yes, they add up to create a large surface area and are covered in capillaries.
spiders don't come into contact with their webs all at once. Instead, they move nimbly along the strands of their webs with only the hairs on the tips of their legs making contact with the sticky threads.
