ETHMOID SINUS: The ethmoid sinuses begin to form in the third to fifth fetal months, when numerous separate evaginations
arise from the nasal cavity.
The histological assessment of uterine epithelium of the OVX group showed many evident evaginations
and hyperplasia of the epithelium.
Glands are evaginations
of the intersegmental membrane between seventh and eighth sternites with the secretory tubules distributed at the proximal dorsolateral portion of the reservoirs.
It is commonly present in the bladder neck and trigone region, where prostatic evaginations
during embryonic development have been reported.
The testis, epididymis, and most of the ductus deferens are enveloped by the vaginal tunic, an evagination
of abdominal peritoneum that extends through the inguinal canal into the scrotum.
californica, a simultaneous hermaphrodite, possess two evaginations
of the common genital gonoduct: the seminal receptacle and the copulatory bursa (Hadfield and Switzer-DunSap, 1984).
The sinovaginal bulbs are two solid evaginations
originating from the urogenital sinus at the distal aspect of the mullerian tubercle, as shown at right (A).
of the dorsal aorta form paired glomeruli, which are partially surrounded by out-pocketing of the nephrostomial ducts (Bowman's capsules).
(3) The anterior and middle ethmoid cells begin as evaginations
from the nasal cavity into the middle meatus at about the third month of fetal development.
The normal pancreas is derived from several evaginations
of the wall of primitive duodenum.