Two facts about the respiratory system include:
Non-specific question
lower and upper respiratory system
1. Respiratory system 2. Cardiovascular system
Pulmonologists treat the lower respiratory system, and otolargyngologists treat the upper respiratory system.
The respiratory system and the circulatory (cardiovascular) system.
These two organs are the lungs.The lungs are these two organs.
The Digestive system, and the Respiratory system.
it consists of two parts
cardiovascular system and respiratory system
The respiratory system is the system that handles breathing.
The respiratory and the endocrine systems.
Circulation system, respiratory system, excretory system, reproductive system, etc.