In Scutigera the tracheae differ both in structure and position from those of all other Chilopoda.
In Porcellio, air-tubes (tracheae) may be present (see below).
Besides the tracheae and tracheids already noted are such cells as "wood fiber," "fibrous cells," and "parenchyma."
This is the cord of tracheae communicating between one breathing-hole and another.
tracheae are abundant just in proportion as blood-vessels become suppressed.
tracheae opening by a pair of stigmata situated above and behind the base of the 4th or 5th or 6th pair of appendages.
tracheae are developed which are dendriform and with spiral thickening of their lining.
I think the part about the relation of the wings and spiracles and tracheae might have been made a little clearer.
A great point of interest therefore exists in the knowledge of the structure and embryology of tracheae in the different groups.
Plexus: a knot: applied to a knot-like mass of nerves, or tracheae.
c.1400, from Medieval Latin trachea (mid-13c.), as in trachea arteria, from Late Latin trachia (c.400), from Greek trakheia, in trakheia arteria "windpipe," literally "rough artery" (so called from the rings of cartilage that form the trachea), from fem. of trakhys "rough." See artery for connection with windpipe in Greek science.
trachea tra·che·a (trā'kē-ə)
n. pl. tra·che·as or tra·che·ae (-kē-ē')
The airway that extends from the larynx into the thorax where it divides into the right and left bronchi. It is composed of thin incomplete rings of hyaline cartilage connected by a membrane called the annular ligament. Also called windpipe.
Plural tracheae (trā'kē-ē') or tracheas