Assessment 4 - Reproductive system Flashcards
Function of Dartos muscle?
Contract and thicken wall of scrotum (raising temp in cold weather)
Name of ducts within testes?
Seminiferous tubules
What cells are found in the seminiferous tubules?
Spermatogenic
Sertoli
Interstitial/ Leydig
Function of spermatogenic cells?
Divide to produce immature sperm
Function of sertoli cells?
Secrete oestrogen and nutrients to prolong survival of sperm
Function of interstitial cells?
Produce testosterone?
Structure and function of epididymides?
Long coiled tube
Stores sperm & allows it to mature
Transport sperm from testis to vas deferens
Function of vas deferens?
Carry sperm from epididymis, via prostate gland, to penile urethra
Composition of spermatic cord
Vas deferens
Testicular artery & vein
Testicular nerve
Lymphatic vessels
Cremaster muscle
Layer of peritoneum (protection)
Name the accessory glands
Prostate glands
Bulbourethral gland (cats)
Function(s) of accessory glands?
Secrete seminal fluid which:
1. Increase vol. of ejaculate 2 aid passage of sperm in2 female tract
2. Aid sperm survival with correct environment
3. Neutralise acidity of urine within eurethra
What holds the ovaries in place next to kidneys?
Ovarian ligament
Function of infundibulum?
Catches and channels the released ova
Location of fallopian tubes?
Connect ovary to uterus
Functions of fallopian tubes/ oviduct (3)
Collect ova from ovary
Transport ova to uterine horn
Good environment for sperm & ova
What lines the fallopian tubes?
Cilia
General uterus structure
Y shaped
Rich blood supply
2 arms = uterine horns
Main stem = uterine body
Location: dorsal abdomen
Layers of the wall of the uterus
Endometrium, myometrium and mesometrium/broad ligament
Function of endometrium?
Provide nutrition for embryo before placenta forms
What is found in the endometrium?
Columnar mucous membrane
Glandular tissue
Blood vessels
What happens to endometrium during pregnancy?
Thickens
What is found in myometrium?
Smooth muscle layers
Function of myometrium and its smooth muscles?
Contraction during parturition
Function of uterine milk?
Provide nourishment for zygote
What is the cervix?
Thick walled muscular sphincter
Apart from muscles, what else is in cervix?
Cartilage
What normally blocks the cervix?
Mucoid plug
What is the purpose of mucoid plug?
Reduce risk of infection in uterus
When does cervix relax?
Passage of sperm
Passage of foetus (parturition)
Where does sperm go before heading to fallopian tubes?
Vagina
Vaginal wall is well developed with…
muscle
Why does the vaginal wall have muscle structure?
To help with the tie process
Vagina extends from …………to ………………..
Uterine cervix
External urethral orifice
Vestibule of vagina extends from ………………………to ………………
External urethral orifice
Vulva
When is Follicle Stimulating Hormone first released?
Late stage of anoestrus
Function of FSH? (2)
Travel to ovary
Growth of immature egg
What hormone does the follicle produce?
Oestrogen
What is the function of prostaglandin?
Uterine contractions
What secretes prostaglandin?
Uterus
What is the function of prolactin? (2)
Mammary gland (growth)
Milk production
Where is prolactin secreted?
Pituitary gland
Function of follicle stimulating hormone in males? And where does it happen?
Development of sperm in seminiferous tubules
What is the male ‘equivalent’ of the Luteinising hormone in males?
Interstitial Cell Stimulating Hormones (ICSH)
Location of testes in male dog?
Outside the body cavity in the scrotum between hind limbs
Location of testes in male cats?
Outside the body cavity in scrotum, ventral to the anus
Reproductive function of the penis?
To transport sperm & seminal fluids from testes into vagina of female
Location and function of os penis?
Within the glans penis
Helps with insertion of penis into vagina when erection is not yet complete
What protects penis from physical trauma?
Prepuce which covers penis
Functions of barbs on cat’s penis? (4)
Nerve pathway (pain)
Message to hypothalamus
Pituitary sends luteinising hormone
Ovulation
Functions of seminal fluid? (4)
Volume of ejaculate
Passage of sperm
Nourishment
Acidity neutraliser
2 functions of ovaries?
Ova production
Progesterone & oestrogen prod.
Function of ovarian ligament
Hold ovary adjacent to kidney
Function of ciliated columnar epithelium in fallopian tube?
Propel ova towards uterine horn
Function of uterus
Give environment for development of foetus
Where are FSH and LH produced?
Anterior Pituitary Gland
Where is oestrogen produced?
Developing follicle in ovary
Where is progesterone produced?
Corpus lutem in ovaries
Where do FSH and LH act? (Females)
Ovaries
Where do oestrogen and progesterone act?
Reproductive tract and brain
Effects of oestrogen?
Flirt
Discharge & swelling
Minus FSH
Plus LH
Effect of FSH? (females)
Stimulates follicles to develop
Effect of LH? (females)
Stimulates ovulation
Follicle rupture
Form corpus luteum (from rest of follicular)
Effects of progesterone? (4)
implantation of embryo prep
Inhibits release of FSH
Mammary tissue development
Increase of progesterone & falling oestrogen = female to accept male
Where do FSH and LH act on males?
Testes
Effect of FSH in males?
Stimulates sperm development
Effect of Lh in males?
Stimulates testosterone production by interstitial cells
Effects of testosterone? (4)
Increased muscle mass
Development of barbs on cat’s penis
Sex drive/ aggression/ mating & territorial behaviour
Development of spermatozoa
What influences the reproductive tract during pro-oestrus?
Oestrogen
During which phase will the female allow herself to be mated?
Oestrus
What inflluences the reproductive tract during metoestrus?
Progesterone
During which period is there little or no ovarian activity?
Anoestrus