Question

the opening of respiratory system is____​

Answer 1

$\bold{\purple{\fbox{\green{Here Is Your Answer Mate}}}}$

nose

Forming the main external opening of the respiratory system, the nose protects the anterior portion of the nasal cavity. The nose is also unique, as it is the only part of the system that is externally visible. The nasal cavity is the uppermost part of the respiratory system, divided into two by the nasal septum.

$\bold{\purple{\fbox{\green{15♡ = IB}}}}$

Answer 2

Answer:

THE OPEN RESPIRATORY SYSTEM IS A SYSTEM WHERE BLOOD IS PUMPED THROUGH BLOOD VESSEL INTO THE BODY