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The special organ in mammals for respiration is
Option: 1
Lungs lying in pleural cavity
Option: 2
Lungs present freely inside the body
Option: 3
Spiracles
Option: 4
Air sacs
Answers (1)
Class Mammalia - Characteristics Features -
- These are the vertebrates that possess hair and mammary glands.
- Mammals are endothermic.
- They show the presence of external ear called pinna.
- The development of teeth occurs in the jaw socket (thecodont); teeth can be classified as incisors, canines, molars and premolars (heterodont); the milk teeth are replaced by permanent teeth (diphyodont).
- They have a four chambered heart with double circulation.
- Respiratory, excretory, nervous and reproductive systems are highly developed.
-
Mammals have lungs for respiration.
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