respiratory system

respiratory system   Dan system789

The main functions of the respiratory system are to obtain oxygen from the external environment and supply it to the cells and to remove from the body the

The respiratory system starts at the nose and mouth and continues through the airways and the lungs Air enters the respiratory system through the nose and Respiratory system Among quadrupeds, the respiratory system generally includes tubes, such as the bronchi, used to carry air to the lungs,

ตรวจ dna The respiratory tract is the path of air from the nose to the lungs It is divided into two sections: Upper Respiratory Tract and the Lower Respiratory Tract  The major organs of the respiratory system function primarily to provide oxygen to body tissues for cellular respiration, remove the waste