Respiration Yu Yanqin(虞燕琴,PhD Dept. of Physiology Zhejiang University, School of medicine
Respiration Yu Yanqin (虞燕琴), PhD Dept. of Physiology Zhejiang University, School of Medicine
Respiration Definition the bodily processes involved in exchange of oXygen(02) and carbon dioxide(Co2) between an organism and the environment Consist of Inspiration: the inhalation of air into the lung Expiration: breathing out
Respiration ◼ Definition: – the bodily processes involved in exchange of oxygen (O2 ) and carbon dioxide (CO2 ) between an organism and the environment ◼ Consist of – Inspiration: the inhalation of air into the lung – Expiration: breathing out
Respiratory system pharynx Oral cavity Upper airway Epiglottis Larynx Esophagus Trachea bronchus Richt Lower airway Thoracic lung Bronchiole cavity Alveoli (cut) Diaphragm Heart Pleural sac Tuggage (cut edges
Respiratory system Upper airway Lower airway
Number Name of branches of tubes in branch Trachea The relaxation/contraction Bronchi of circular smooth muscle lining these“ airways 9NEa 8 determines how easily Bronchioles airflow can occur Terminal bronchioles 6x1 Respiratory bronchioles Most gas exchange 5x10 occurs in the alveolar sacs cON>o@a Alveolar ducts Alveolar sacs 8x106
The relaxation/contraction of circular smooth muscle lining these “airways’” determines how easily airflow can occur. Most gas exchange occurs in the alveolar sacs
phere 0, co, The goals of respiration About 20-30 to provide oxygen to the tissues About 3 x 10 alveoli a to remove carbon dioxide Left heart About 3 x 10 capillaries Tissue cell
The goals of respiration ◼ to provide oxygen to the tissues ◼ to remove carbon dioxide