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).
Evaginations 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.
