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13/2 Comparative Anatomy -Respiratory system (Structure (Upper…
13/2 Comparative Anatomy
-Respiratory system
Functions
Primary function
Secondary function
Structure
Upper respiratory system
-Nose
-Paranasal sinuses
-Pharynx
-Larynx
-(nasal sinuses)
Lower respiratory system
-Bronchi
-Lungs
-Traches
-Pleura
External nares
Nasal cartilage
Rostral bone in pig
-All sensitive
Nasal passage
Two External openings
Rostral to eyes and dorsal to mouth
Seperated by septum
Hard and soft palate separate
opening from mouth
Function
-Allow air to enter the respiratory system
-Warm air through heat from blood vessels near surface
-Humidify air though damp mucus lining.
-Filter the air that passes through the passages.
Paranasal sinuses
Air filed cavity in cranial bones
Provide protection and insulation in head?
Pharyx
Shared passage way fro both air and
food lying caudal to oral and nasal cavitives
Larynx
Regulates size of airway
Laryngel muscles
Five mucous membrane-lined cartilages
Epiglottic cartilage
Thyroid cartilage
Cricoid cartilage
Paired arytenoid cartilage
Functions
Gives protection
Control of airflow
Warming and humidifying
Trachea
Short, wide tube extending from larynx to broncho
Lining tissue has hairs, WHY?
-
Functions
-Keep airways open
-Warms and moisten airs
Bromchi
Thorax
Lungs
Pleura
Inspiration and expiration
1)Nostril, nasal passage, pharynx, larynx, traches, bronchus, bronchiole, alveolar duct, alveolus.
Alveoli
Air enters alveoli=
Site of transfer of oxygen to blood, and carbon dioxide expelled in out breath
Surrounded by capillaries
Very thin
Moist lining
Good ventilation
Diffusion
Dead space