Difference between Trachea and Spiracles
No. | Trachea |
Spiracles |
1. | A mobile cartilaginous, fibrocartilaginious, non-collapsible tube or membranous tube which made the beginning of the lower respiratory tract is known as Trachea. | An external opening by which air of the environment enters into the trachea is known as spiracles. |
2. | Trachea is present in terrestrial animals like birds and humans. | Spiracles are present in the insects and some cartilaginous fish like sharks and stingrays. |
3. | Trachea is made up of tough cartilage rings which are total 20 in number. | Spiracles are made up of a pair of opening just behind the fish’s eyes. |
4. | Function of trachea it protects lower respiratory tract, it is also known for windpipe, it helps to carry warmed air to the lungs and air comes from mouth and nose, It allows oesophagus to expand into the space and it provides airway for air to enter the lungs and to exit the lungs. | Spiracles are present on the exoskeletons of insects and its function includes it helps oxygen to reach lungs which is an internal respiratory organ and it is useful in breathing. |