Even without any deformity the rachitical process is accompanied from an early time with bronchial and tracheal catarrh.
There are two tracheal openings just behind the openings of the lungs.
Respiratory organs in the form of tracheal tubes opening by a pair of stigmata in the 2nd and 3rd somites of the opisthosoma.
It is difficult to determine if the nerves supply the tracheal end cells or the photogenic cells.
Section through a tracheal pit and diverging bundles of tracheal tubes taken transversely to the long axis of the body.
He believed that the "air-vessels" or tracheal elements, tended to draw the plant upwards, and the roots to pull it downwards.
The dorsal rows of tracheal apertures are continued into the head and give rise in this situation to enormous bundles of trache.
We remember that the transverse processes are often, from their relation with the trachea, known as the tracheal processes.
The tracheal opening is in the middle of the abdomen, nearer the epigynum than the spinnerets.
The tracheal opening is not as far forward as in bimaculata, being nearer the spinnerets than the epigynum.