Yes the hypothesis of the sea-floor spreads through the ocean ageing
Answer:
i think it's beccause basalt let's more waves in
Explanation:
Because havee a especial character who acn do thant
If the inner lining of the air sacs neither thin nor highly vascularized, then it can be inferred that AIR SACS ARE CANNOT BE THE SITES OF GASEOUS EXCHANGE BETWEEN AIR AND BLOOD. Air sacs are generally lined with mucus and surrounded with blood capillaries.
In case of birds, air sacs play an important role in respiratory system.