Respiratory System.

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Presentation transcript:

Respiratory System

CATS Respiratory system on cat: Diaphragm Visceral pleura Trachea Pharynx (Back of throat) Larynx Bronchus

Larynx (Esophagus behind) Trachea Lungs (visceral pleura is shiny surface) Diaphragm

Trachea Primary Bronchi Secondary bronchi

MODELS Upper Respiratory model: External nares Nasopharynx Lingual frenulum (attachment under tongue) Oropharynx Uvula Palatine tonsil (part of the immune system) Laryngopharynx Thyroid gland

Nasopharynx Uvula Oropharynx Laryngopharynx

Trachea model: Trachealis muscle Arytenoid cartilage Cricoid cartilage Hyoid bone Thyroid cartilage Glottis (hole opening to the trachea) Epiglottis (“leaf-like” flap that covers glottis)

Hyoid bone Epiglottis Thyroid cartilage Glottis Arytenoid cartilage Cricoid cartilage Trachealis muscle Thyroid gland

Hyoid bone Epiglottis Thyroid cartilage Trachealis muscle Thyroid gland Cricoid cartilage

Hyoid bone Epiglottis Thyroid cartilage Glottis Vocal cord Arytenoid cartilage Cricoid cartilage

Larynx The ability to vary the pitch of the voice results from the tension in the vocal cords. The epiglottis is a leaf-shaped flap that closes over the glottis during swallowing to keep food from entering the trachea.

Lung The right lung is larger than the left one. More cigarette smoke gets in this side Cancer is more common in the right lung Most foreign substances in the air do not reach the lungs because the ciliated epithelium and mucus that line the respiratory passages trap them and we cough it up.

Thyroid cartilage Cricoid cartilage Thyroid gland Trachea Lung Visceral pleura (shiny top layer)

Trachea Primary Bronchi Secondary Bronchi Hilus (root)

SAC Models Hilus of lung

SAC Models Trachea Primary bronchus Secondary bronchus Tertiary bronchus

Bronchiole Alveoli

Diaphragm When the diaphragm contracts: the thoracic cavity increases the pressure inside the thoracic cavity drops The air flows into the lungs

SLIDE: LUNG Trachea Bronchi (larger, has cartilage) Bronchiole Made of hyaline cartilage Lined with pseudostratified columnar epithelium Bronchi (larger, has cartilage) Bronchiole Alveolus (Functional unit of the lung)

Lung Bronchi Bronchiole Alveoli

Lung

Lung Alveoli Bronchiole Artery

Lung Esophagus Trachea