Examples of trachea

• Initial studies on in-utero tracheal occlusion were undertaken by tracheal ligation,111 using clipping of the fetal trachea.

• From top left to right bottom: epiglottis, vocal cords, trachea, carina, inflated and detached balloon, vocal cords about to close over the balloon.

• All are oriented with the anterior to the right and show the mouthparts, the two dorsal branches of the tracheae and the midgut.

• From that point on, the embryos that did not hatch progressed through the stages of brown midgut, brown tracheae and death.

• At its upper end, the trachea enters the larynx, which in turn opens into the pharynx.

• A femoral vein and the trachea were cannulated.

• This nematode was found in the air sacs and trachea in nearly equal numbers (table 1).

• The fetal trachea is filled with amniotic fluid, and thus readily seen using sonography.