respiratory system

respiratory system   Dan respiratory system

The lower respiratory tract consists of the trachea , bronchial tubes, and lungs The bronchial tubes carry air into the lungs and branch into smaller

10 Surprising Facts about the Respiratory System · 1 The lungs are the only organs that can float on water · 2 Your lungs are not sterile or When we breathe, the respiratory system takes in oxygen and sends out carbon dioxide The cells in our bodies need fresh oxygen to stay alive

ตรวจลอตเตอรี่ 1 ตุลาคม The respiratory system takes up oxygen from the air we breathe and expels the unwanted carbon dioxide  Basic types of respiratory structures Respiratory structures are tailored to the need for oxygen Minute life-forms, such as protozoans, exchange oxygen and