breathing. -.-
haha jk
The common purpose of the respiratory and circulatory systems are bringing oxygen into the body for cellular processes, and bringing carbon dioxide waste out of the body. The circulatory system has many other functions as well.
The nerves help you feel things in your body
The respiratory system is the system that handles breathing.
The Respiratory System
The trachea is the airway in the respiratory system.
no, they do not have a respiratory system
The respiratory system.
Respiratory system
how does the respiratory system work
1. Respiratory system 2. Cardiovascular system