The comparison of the choroid plexus to a worm is very common.
This notch is the only rudiment of the choroid fissure of other types.
In Teleostei there is at first a vascular loop like that in Birds, passing through the choroid fissure.
Lining the inner surface of the sclerotic is the second coat, the choroid.
Their external border is continuous with the internal layer of the choroid coat.
The whole structure is known as the tela vasculosa, or choroid plexus of the fourth ventricle (fig. 250, chd 4).
The retina is subject to inflammation, to detachment from the choroid, to haemorrhages from the blood-vessels and to tumour.
The thicker outer wall gives rise to the retina, and the thinner inner wall to the choroid pigment.
Up to the fifth day this vascular loop is the only structure passing through the choroid slit.
On the sixth day the choroid slit becomes rapidly closed, so that at the end of the sixth day it is reduced to a mere seam.
choroid cho·roid (kôr'oid') or cho·ri·oid (kôr'ē-oid')
The dark-brown vascular coat of the eye between the sclera and the retina. adj.
Relating to the chorion or corium.