Question

describe respiratory system.

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Answer 1

A N S W E R :

❍ The " Respiratory System " is proven to be derived from " Endoderm ".

❍ Whether aquatic or terrestrial, all mammals use atmospheric air for the fulfilment of their respirational needs.

❍ The human respiratory system consists of the following organs –

• Nostrils

• Nasal cavity

• Nasopharynx

• Larynx

• Trachea

• Bronchi

• Bronchioles

• Alveoli

• Lungs

• Diaphragm

❍ The nose is the first of the respiratory passages through which, the inspired air passes.

❍ The nasal cavity consists of a large irregular cavity, which is divided by a septum.

❍ The nasopharynx lies behind the nasal cavity, above the level of the soft palate.

❍ The " Glottis " is an opening in the floor of the pharynx leading to the larynx.

❍ " Epiglottis " is the structure thats prevent the entry of food into the respiratory tract during swallowing.