ATE 1110 – Respiratory System | Veterinary Anatomy and Physiology Study Guide!!Grade A+ Guaranteed!!!Q and A

ATE 1110 - Respiratory
System

, Organs of Respiratory System Nostrils, nasal cavity, nasopharynx, larynx, trachea, and lungs
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Functions of Respiratory System kr kr kr




External respiration, regulates the acidity of extracellular fluids of body, assists in temperat kr kr kr kr kr kr kr kr kr kr kr kr




ure control, helps in voice production
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Organs of upper respiratory tract kr kr kr kr Nostrils, nasal cavity, nasopharynx, larynx, and trachea kr kr kr kr kr kr




Organs of lower respiratory tract kr kr kr kr




Lungs, and branches of trachea ( bronchioles, bronchi, and alveoli ) kr kr kr kr kr kr kr kr kr kr




Nostrils (nares) kr The external openings for the nasal cavity
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The shape of nostrils varies in different animals
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The nostrils are very delicate in horses-while in pigs, nostrils are rigid
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The skin surrounding the nostrils is called muzzle and contains thick and non-
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hairy skin with numerous sweat glands
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External Nares External opening of the respiratory tract
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Philtrum It is a groove between nostrils and upper lip
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Alar fold kr A bulblike structure inside nostrils that allows circulation of air
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Nasal Cavities The two nasal cavities are separated by a cartilage called nasal septum
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Hard palate and soft palate separate the nasal cavities from mouth cavity
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Distally nasal cavities continue into pharynx
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Both nasal cavities are lined by pseudostratified columnar epithelium that is covered a mucus mem
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brane

Nasal turbinate bones or conchaekr kr kr kr




These are like two selves, which divide each nasal cavity into three meatuses (passages) call
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ed dorsal nasal meatus, middle nasal meatus, and ventral nasal meatus
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They are highly vascular and lined by pseudostratified epithelium that is covered mucus membrane
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. This arrangement helps to clean, warm and humidify the inhaled air
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Olfactory nerve (1st cranial nerve) kr kr kr kr




The mucosa in the caudal part of nasal cavity receives sensory nerve fibers from the olfactor
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y nerve, that carries impulses of smell to the brain
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