The photomicrograph shows a cross-section of part of the gas exchange system of a mammal.
What is shown by the line labelled V?

1 )
the diameter of an alveolus
the diameter of a bronchiole
3 )
the diameter of a capillary
4 )
the diameter of a trachea
تحلیل ویدئویی تست
منتظریم اولین نفر تحلیلش کنه!