Testicular Morphology and Function Flashcards
Basic Components of the Male
Reproductive System (6)
- Spermatic Cord
- Scrotum
- Testis
- Excurrent Duct System
- Accessory Sex Glands
- Penis and Muscles for Protrusion, Erection and Ejaculation
total length of sperm transport and storage (days) in boars
9-14
total length of sperm transport and storage (days) in bulls
14
where does the spermatic cord extend from and what does it do
-Spermatic cord extends from the inguinal ring to its attachment
on the dorsal pole of testis. It suspends testis in the scrotum on the dorsal pole of testis. It suspends testis in the scrotum
-Spermatic cord provides the pathway to and from the body for
the testicular vasculature, lymphatics and nervesthe testicular vasculature, lymphatics and nerves
what are the 3 steps/stages in spermatogenesis
proliferation, meiosis, differentiation
5 basic steps of sperm production
- high speed manufacturing
- finishing shops (fluid absorption)
- warehouse and shipping
- final alterations and packaging (metabolic substrates, surface coatings, transport for spermatozoa)
- delivery system (erection… ejaculation)
duration of spermatogenesis for bulls (days)
60
total length of sperm transport and storage (days) in rams
12
total length of sperm transport and storage (days) in stallion
9
duration of spermatogenesis for rams (days)
50
duration of spermatogenesis for boars (days)
40
duration of spermatogenesis for stallions (days)
55
duration of spermatogenesis for rats (days)
50
duration of spermatogenesis for mice (days)
35
duration of spermatogenesis for men (days)
75
duration of spermatogenesis for rabbits (days)
45
how long is required for restoration of normal spermatogenesis after treatment
6 to 12 wks required before restoration of normal spermatogenesis can be accomplished post treatment or
exposure to deleterious events
how long do you have to wait to see effects of deleterious events of sperm
2 to 4 wks delay before effects of deleterious events (heat stress, shipping, fever, exposure to toxins) can be observed
what is seminal plasma produced by (5)
- Epididymis
- Ampulla
- Vesicular glands
- Prostate gland
- Bulbourethral glands
pH of seminal plasma
pH 7.2-7.8
what is seminal plasma?
Buffered, nutrient, protective transport medium
contents of seminal plasma
-electrolytes
-proteins
-citric acid
-enzymes
-buffers
-energy sources
-prostaglandins
-antibacterials, zinc
what is the importance of scrotal temperature
Testicular endocrine and spermatogenic function is optimal
when scrotal temperature maintained at 3-4°C below the body
temperature
what controls scrotal temperature
Counter-current heat exchange in the pampiniform plexus controls the scrotal temperature
