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A structure that runs along the exterior of the testis and can be divided into three segments. Also a tubular organ responsible for spermatozoa maturation, transport and storage. Epididymis
An invagination of the body wall, resulting in the formation of an outer (parietal) and inner (visceral) layer. Tunica Vaginalis.
Both the external and internal cremaster muscles surround the spermatic cord. Name the remaining tissues that comprise the spermatic cord. Arteries, veins, nerves, lymphatics, and the vas deferens.
comprised mainly of dermal layers, the tunica dartos, and an underlying layer of connective tissue; located within the dermal layers are numerous hair follicles, sweat glands, and wrinkles; all of which are integral for proper thermoregulation of testis. Scrotum
Connective tissue structure that originates from the tunica albuginea and penetrates the medulla of the testis. Septae
Consisting mainly of connective tissue, this is the larger of two cavernous bodies in the fibroelastic specis. Corpus cavernosum penis.
In avian species, semen is conducted from the ? through the ? and ? before emission in the ? . testis, epididymis, vas deferens, cloaca.
In the female opposum, that main vaginal body bifurcates into two lateral vaginal canals, thus in order to inseminate both later vaginal canals simultaneously, the male has adapted what part of his penis? Glans penis
In what species is there a structure closely related to the prepuce that is known to collect debris and is believed to help spread pheremones? Also, what is this structure called? Boar, Preputcial pouch
Inside of the tunica vaginalis is a smooth muscle layer that plays a role in testicular thermal regulation, what is the name of this muscle? Internal Cremaster Muscle
It is these muscles that maintain the s-shaped structure depicted below in the fibroelastic species. Penile retractor muscles.
Name of the hair-like appendage extending from the glans penis; what species is this found on? Filiform appendage; ram.
Name the four reproductive structures found in the rooster. Testicle, epididymis, vas deferens, and cloaca.
Name the skeletal muscle that surrounds the penile bulb. Bulbospongiosus muscle
Name the skeletal muscles which forms a C-shaped clamp around the cavernous body that will form a majority of the penis in the fibroelastic species. Ischiocavernosus muscle.
Name the three sections of the epididymis. Caput epididymis (head), corpus epididymis (body), and cauda epididymis (tail).
Name the two types of prostate glands found in the bull. Disseminate prostate and corpus prostate.
Resembling a pile of spaghetti, this anatomical structure contains roughly 85% of the spermatic cord vasculature. Comprised of one artery and two veins, it is here where counter current exchange of heat is a requirement process for arterial blood to reach the temp required for spermatogenesis. Pampiniform Plexus
The accessory sex gland that is typically found in the ruminant species. Often described as an enlarged portion of the vas deferens, this accessory sex gland possesses two distinct functions: transport and exocrine. Contributing seminal plasma to the ejaculate and is most similar in morphology to the disseminate prostate in that glandular tissue surrounds the lumen. It is also the only accessory sex gland that transports spermatozoa. Ampulla.
The bull possesses a mixed form of this gland, corpus and disseminate. Prostate Gland.
The C-shaped cone of skeletal muscle that envelopes the spermatic cord outside of the tunica vaginalis parietal encompassing the dorsal pole of the testes. This structure is involved in the elevation of the testes during the fight or flight response. External cremaster muscle.
The lumen of the penile shaft is continuous with what structure? Penile Urethra
The lumen of this duct is characteristically iron cross in appearance. Vas Deferens
The paired set of accessory sex glands indicated by the black arrows resembles a grape like cluster and is partially responsible for a majority of seminal plasma production. This paired gland is missing in the llama but is very prominent in the boar. Vesicular gland or seminal vesicles.
The penis of the male llama possess a structure that, while not required for insemination in the llama, is most similar to what other barn yard sp? Boar.
The rete testis are located in this central structure. Mediastinum.
The smaller of two cavernous bodies in the fibroelastic penis. Corpus spongiosum penis.
The structure through which urine and ejaculate will exit the penis. Embedded within the corpus spongiosum penis, it is divided into two separate segments: pelvic and penile/ What is the name of this tubular structure? Penile Urethra.
This gland contributes the most to the seminal plasma. Prostate Gland.
This is the only accessory sex gland encased in a layer of skeletal muscle. Embedded within the bulbospongiosus muscle along with the penile bulb, it is also known as the Cowper’s gland. What is the second name for this gland? Bulbourethral gland.
This paired structure will fuse to become one of the cavernous bodies found in the penis. Engorgement of this structure is controlled by the ischiocavernosis muscle. Crura or crus penis
This tubular structure is responsible for transporting mature spermatozoa from the cauda epididymis to the ampulla or pelvic urethra. Traversing the length of the corpus epididymis, it is not encapsulated by the muscle layers in the spermatic cord. It is this tubular organ that is excised and ligated in the human during a vasectomy. Vas Deferens or Ductus Deferens
What is the name of the s-shaped structure found in the bull, ram, boar, dog, and stallion? Sigmoid flexure.
What is the name of the structure that is the opening for the penis to the outside worl? Prepuce.
Why is it that in a majority of male mammals, testicular temperature is maintained 4-6 degrees C lower than core body temperature? Meiotic divisions involved in spermatogenesis are temperature sensitive.