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Trachea
frog
larynx,trachea, bronchi
The spiracles and trachea are structures that enable respiration in insects. Air enters the body through the spiracles and then travels through the trachea. Spiracles are tiny holes in an insect's exoskeleton, and the trachea is a network of tubes.
the trachea
trachea
The correct order of structures from the entrance of the nose to the trachea is: nasal cavity, pharynx, larynx, and then trachea. Air enters through the nostrils into the nasal cavity, passes through the pharynx, where it can also be directed to the esophagus, then moves into the larynx, which contains the vocal cords, before entering the trachea.
Primary bronchi
Cilia.
Cilia are hairlike structures that line the nasal cavities and the trachea. They help to sweep mucus and particles out of the respiratory system to keep it clean and protect the lungs from infections.
Carinal canals are located in the trachea (windpipe) where the trachea bifurcates into the left and right bronchi. Their function is to provide oxygenated blood supply to the structures in the trachea and bronchi.
The trachea is derived from the endoderm germ layer. Specifically, it develops from the foregut region of the endoderm during embryonic development. The surrounding mesoderm contributes to the cartilage and connective tissue structures of the trachea.