Mariah HIll & Peyton Bowman Computer Info Systems Hill&Bowman.
Respiratory System Ms. Bowman. Functions Supply the body with oxygen Dispose of carbon dioxide.
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Transcript of Respiratory System Ms. Bowman. Functions Supply the body with oxygen Dispose of carbon dioxide.
Components
• Made up of the nose, nasal cavity, pharynx, larynx, trachea, bronchi (and smaller branches), lungs (and its components)
Nose• Only externally visible part of the
respiratory system• Functions• Provides an airway for respiration• Moistens and warms entering air• Filters and cleans inhaled air• Serves as a resonating chamber for
speech• Houses olfactory (smell) receptors
• 2 nostrils divided by a cartilaginous septum
Pharynx
• Connects the nasal cavity and mouth to the larynx and esophagus
• Also called the throat• Walls are lined with
muscles (for swallowing)
Larynx
• Also called the voice box• Between the pharynx and the
trachea• Houses vocal cords• 3 functions• Provide an open airway • Act as a switching mechanism to
route air and food into proper channels
• Voice production
Trachea• Also called windpipe• Extends from larynx
into the mediastinum (**remember-the cavity in the chest that houses the heart) to the bronchi
• Cilia(hairlike projections) line the wall and filter debris from entering the lungs
Bronchi• The bronchi and its branches
are often referred to as the Bronchial Tree (because it looks like a tree branching off of the trachea)
• 2 main bronchi branch off from the trachea and then continue to branch off inside of each lung
• At the end of the terminal bronchioles, there are alveoli (thin-walled air sacs)
Lungs• Paired lungs occupy all of the
thoracic cavity except the mediastinum
• Each lung suspended in its own pleural cavity and connected to mediastinum by vascular and bronchial attachments
• The exchange of fresh oxygen into the blood and carbon dioxide waste product out of the blood occurs at the alveoli