Respiratory System
Bronchus The right and the left main bronchi are tubes that deliver air from the trachea to the lungs Lined with cilia (tiny hairs) to remove dust
Bronchioles Small branches of the Bronchi At the end of each bronchioles is an Alveolus
Alveolus(alveoli) Tiny air sacs Walls are one cell thick Location of gas exchange
Capillaries A network of blood vessels Blood receives new oxygen and releases its carbon dioxide Alveoli Bronchiole Capillary Blood without oxygen, from the heart Blood with oxygen to the heart
Aveolus (aveoli)
Protection of Lungs Pleura Pleural Fluid Ribs & Sternum Thoracic vertebrae Intercostal Muscles
Pleura Each lung is surrounded by pleural fluid for protection Around this fluid is a thin protective membrane called the pleura
Intercostal Muscles These muscles are located around the ribs to aid with movement and protection
Thoracic Vertebrae These are the vertebrae that compose the back of the thoracic cavity The ribs attach to them
Pretend that you are a molecule of oxygen…. Describe your path from the air in the environment to the blood in the capillaries
Diaphragm A large muscle at the bottom of the chest It controls the movement of air in and out of the lungs
Inhalation The diaphragm contracts down to pull air into the lungs The ribs expand
Exhalation The diaphragm relaxes up to push the air(carbon dioxide) out of the lungs The ribs relax smaller
Asthma