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Respiratory organs in aquatic arthropods like crayfish, prawns, and molluscs like Unio are
(a)Body wall
(b)Lungs
(c)Tracheae
(d)Gills

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Important Questions on Breathing and Exchange of Gases
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Pulmonary respiration is most well-developed in

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Which structure in human respiratory system is not involved in conditioning of air?

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A thin-elastic cartilaginous flap which prevents the entry of food into the larynx is known as

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At which level of thoracic vertebra, does trachea divide?

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The trachea divides into right and left:

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Which membrane covers the lungs and provides protection?

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Where are lungs situated in the human body?

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Select the last step involved in respiration.
