Respiratory System.

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Presentation transcript:

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