Figure 12 -
a, Arrow from proboscis-cavity (
pc) passing to left of pericardium (
per) and out through proboscis pore-canal.
b1, arrow from central canal of neurochord (
cnc) passed out through anterior neuropore.
b2, ditto; through posterior neuropore.
c, arrow intended to pass from 1st gill-pouch through collar pore-canal into collar-coelom (
cc).
cts, posterior limit of collar.
dv, dorsal vessel passing into central sinus (
bs).
ev, efferent vessel passing into ventral vessel (
vv).
epr, epiphysial tubes.
st, stomochord.
vs, ventral septum of proboscis.
sk, body of nuchal skeleton.
m, mouth.
th, throat.
tb, tongue-bars.
tc, trunk coelom (Encyclopaedia Britannica, undated)
The following image shows the location of some organs in different viwes and also some structures (figure 13)
Figure 13 - Location of organs and structures of Enteropneust (Rachel, 2012; Myers, 2006)