respiratory system

respiratory system   Dan system789

The respiratory tract comprises the nose, throat , windpipe , bronchi and lungs An online study is learning about the respiratory

The respiratory system facilitates breathing In the alveoli tissue of the lungs, the exchange of oxygen and carbon dioxide molecules between the air and the The respiratory system is a collection of organs that are essential for the process of breathing

อ้อยเป็นผักหรือผลไม้ The respiratory system is a biological system consisting of specific organs and structures used for gas exchange in animals and plants  Canalicular Stage: Weeks 16-26 Throughout the canalicular stage, the respiratory bronchioles develop, budding off from the terminal bronchioles