ABDOMINAL VISCERA OF THE HORSE. 
85 
Ejaculatory Ducts. 
Two in number, each being the common outlet to its corre¬ 
sponding vas deferens and seminal vesicle, so that their contents 
may pass into the urethra by an elliptical orifice each side of the 
depression on the verumontanum. 
The relations of these ducts are simply to the prostate and 
urethra. When they reach the latter they pass between the 
muscular and mucous coat for some little distance, so that at 
first sight they appear shorter than what they really are. 
The structure of the ejaculatory ducts consists in an outer 
cellular and inner mucous lining, both of which are very thin. 
Prostate. 
The prostate belongs to the class of secreting glands. It is 
situated on the commencement of the urethra and termination of 
the vesiculse seminales, being superiorly related to the rectum. 
Its attachments to these parts are merely cellular, although it has 
some connexion with the sides of the pelvis, rectum and bladder, 
through the intervention of the pelvic fascia. 
It is symmetrical in figure, and very variable in size, being 
quite rudimentary in aged geldings. It is of a grey colour, 
knotty to the feel, although spongy in texture. 
The prostate consists of a middle portion or body and two 
lateral lobes. The former is in contact with the cervix of the 
bladder and urethra, the latter with the ejaculatory ducts and 
seminal vesicles. 
This gland has a posterior convex and an anterior concave 
margin, whilst it is flattened from above downwards, although 
from its connexion with other parts it is rendered more or less 
convex from side to side. 
The prostate is composed of an external fibrous or cellular 
coat, which forms a complete covering to it. On cutting the 
gland in any direction, it is observed by the naked eye to have 
an areolar appearance, being a net-work of variously disposed 
fibres, the larger ones of which are found to be tubular. 
The prostate opens into the urethra around the orifices of 
the ejaculatory ducts by numerous apertures. 
It is supplied with blood from the pudic vessels, and 
its nerves are derived from the lesser splanchnic and two last 
sacral pairs. 
