<i >Syngamus trachea</i> worms, tracheal lumen, poultry

Syngamus trachea worms, tracheal lumen, poultry

Male and female S trachea worms entwined in tracheal lumen. Note how the longer female worm attaches to the trachea and the shorter male worm attaches to the female worm, forming the characteristic Y shape.

Courtesy of Dr. Jean Sander.