REPRODUCTIVE SYSTEM Flashcards
Gametogenesis
Fertilization
Development and nourishment of a new individual
Production of reproductive hormones
FUNCTIONS OF THE REPRODUCTIVE SYSTEN
Prophase 1
Synapsis, Crossing over
Metaphase 1
Anaphase 1
Telophase 2
Meiosis 1
Prophase II
Metaphase II
Anaphase II
Telophase II
Meiosis II
Type of cell division specialized for Sexual reproduction.
MEIOSIS PROCESS
Saclike structure containing the testes.
Helps the testes warm.
SCROTUM
causing the skin of the muscle become firm and wrinkled and reducing its overall size.
Dartos muscle
contracts and help pull the testes nearer the body.
Cremaster muscles
The response of the Dartos and Cremaster muscles are important because sperm cells are very ___ and do not develop normally if the testes become to warm or too cool.
temperature-sensitive
small, oval-shaped organs, within the scrotum both exocrine and endocrine glands
TESTES
major exocrine secretion of the testes is?
sperm cells
major endocrine of the testes is?
testosterone
the tough fibrous layer of connective tissue that surrounds the corpora cavernosa of the penis
tunica albuginea
where sperm cells develop
seminiferous tubules
secrete testosterone
interstitial (Leydig) cells
3 genital ducts of the testes
tubuli recti, rete testis, efferent ductules
Formation of the sperm cells.
SPERMATOGENESIS
Takes ____ for sperm to produce.
74 days
divide and differentiate during spermatogenesis from sperm cells.
Germ cells-
large, extend from the periphery to the lumen of the seminiferous tubule.
Sustentacular (sertoli) cells
STEPS IN SPERMATOGENESIS
Spermatogonia
Primary spermatocytes
Secondary spermatocytes
Spermatids
Sperm cell/ Spermatozoon
where does the spermatogenesis located?
around the lumen of seminiferous tubules
vesicle anterior to the nucleus; contains enzymes that are released during the process of fertilization and are necessary for the sperm to penetrate the oocyte (egg cell).
Acrosome
process of semen ejaculation
seminiferous tubules → tubuli recti → rete testis → epididymis → ductus deferens → ejaculatory duct → urethra
comma-shaped structure on the posterior side of the testis; final maturation of the sperm happens.
Epididymis
seminiferous tubule; empties into efferent ductules.
Rete testis-
carry sperm from the testis to tightly coiled series of threadlike tubules that form a comma-shaped structure on the epididymis.
Efferent ductules
Tube that carries sperm from the testis into the body cavity of the male.
Ductus Deferens
total length of ductus deferens and ejaculatory duct
45cm
short ducts extend from the seminal vesicle to the ampulla of the ducts deferens
Ejaculatory duct
enters the prostate gland and joins the urethra
Ejaculatory duct
20cm; passageway for both urine and reproductive fluids
Urethra
passes through the prostate gland.
Prostatic urethra
passes through the floor of the pelvis and surrounded by external urinary sphincter.
Membranous urethra
extends length of the penis and open its end.
Spongy Urethra
Male copulation and functions in the transfer of sperm cells from male to female.
PENIS
Male copulation and functions in the transfer of sperm cells from male to female.
PENIS
two columns of erectile tissue form the dorsal portions and the sides of the penis.
Corpora cavernosa-
third smaller erectile column occupies the ventral portion of the penis.
Corpus spongiosum
distal end of the penis; cap.
Glans penis
loose fold of the skin.
Prepuce (foreskin)
exocrine glands that secrete material into the ducts of the male reproductive tract.
Accessory glands
Thick, mucus like secretions, fructose, citric acid,other nutrients.
Nourishment of sperm cells
Coagulation of semen
Movement of Sperm cells
Seminal vesicle-
Thik, milky, alkaline secretion
Regulate pH
Aid in sperm cell to oocyte
Prostate gland
pair of small, mucus-secreting glands located near the base of the penis.
Bulbourethral (Cowper) glands
sperm cells and secretions from the accessory glands
Semen
Released from neurons in the hypothalamus and travels to the anterior pituitary gland.
GnRH
Influences the function of the gonads.
Luteinizing hormone (LH)
Follicle stimulating hormone (FSH)
Gonadotropins
Interstitial cell in the testes; secrete testosterone.
Luteinizing Hormone
Sustentacular cells in the seminiferous tubules; promotes sperm cell development
Follicle stimulating hormone (FSH)
Has a stimulatory effect on the sustentacular cels of seminiferous tubules.
Development of reproductive organs and secondary sexual characteristics.
Testosterone
Has a negative-feedback effect on the secretion of FSH from the anterior pituitary gland.
Inhibin
movement of sperm cells, mucus, prostatic secretions, seminal vesicle secretions into the prostatic membranous and spongy urethra.
Emission
forceful explosion of the secretions that have accumulated in the urethra to the exterior
Ejaculation
Sensations, normally interpreted as pleasurable, occur during the male sex act and result in an intense sensations.
Orgasm
penis becomes flaccid, and overall feeling of satisfaction exists, and male is unable to achieve erection and second ejaculation.
Resolution
small organ suspended in the pelvic cavity by two ligaments; FEMALE GONADS.
Ovaries
extends from each ovary to the lateral body wall.
Suspensory ligament
attached the ovary to the superior margin of the uterus
Ovarian ligament
broad ligament by folds of peritoneum
Mesovarium
contain oocyte
Ovarian follicles
the female reproductive cell.
Oocyte
extend from the area of the ovaries to the uterus; receive secondary oocyte.
Uterine tubes (fallopian tube)
long, thin process surrounding the opening of each uterine tube.
Fimbriae
where fertilization occurs.
Ampulla
uterine wall.
Implantation
Oriented in the pelvic cavity with the larger, rounded part directed superiorly,
Uterus
uterus superior to the entrance of the uterine tubes.
Fundus
main part of the uterus.
Body
narrower part directed inferiorly.
Cervix
continues through cervix.
Uterine cavity-
opens into the vagina.
Cervical canal
serous layer; formed from visceral layer
Endometrium
simple columnar epithelial cells with an underlying connective tissue; superficial part is sloughed off during menstruation.
Endometrium
female organ of copulation; receives the penis during sexual intercourse.
Vagina
- consists of vestibule and it’s rounding structures.
Vulva (pudendum)
thin border of the vestibule longitudinal skin folds.
Labia minora
small erectile structure; made up of erectile tissues.
Clitoris
2 labia minora.
Prepuce
Produce a lubricating fluid helps maintain the moistness of the vestibule.
Greater vestibular glands
rounded folds of the skin.
Labia majora
elevation of tissues over the pubic symphisis.
Mons pubis-
space between the labia majora.
Pudendal cleft
area between the thighs.
Clinical perineum
organs of the milk production and are located in the breasts.
Mammary gland
pigmented area; surrounds the nipple.
Areola
opens independently to the surface of the nipple.
Lactiferous duct
milk producing, or lactating mammary gland.
Alveoli
surrounds the alveoli and contract t expel milk from the alveoli,
Myoepithelial cells
spreads out on both sides of the uterus and attaches to the ovaries and uterine tubes.
Broad ligament
extends ovary to the lateral body wall.
Suspensory ligament
attaches the ovary to the superior margin of the uterus.
Ovarian ligament-
Where ovarian arteries, veins and nerves transverse the suspensory ligament and enter the ovary.
Mesovarium
contains oocyte.
Ovarian follicles-
process of gamete production in females.
Oogenesis
cells from which oocytes develop.
Oogonia
sperm cell binds to a plasma membrane and penetrates the plasma membrane of a secondary oocyte.
Filtration
primary oocyte + granulosa cells
Primordial follicle
Puberty; Zonna pellucids
Primary follicles-
Vescicle form among the granulosa cells, theca forms
Secondary follicle
antrum fluid filled chamber
Mature follicle (Graafian follicle
corpus luteum, corpus albicans
Fate of the Follivle
menstrual bleeding
Menarche
Between ages 11-13 and completed by age 16.
Menarche- menstrual bleeding
Increasing rate of estrogen and progesterone secretion by the ovaries
Reproductive organs begin to enlarge
Pubic and axillary hair growth.
FEMALE PUBERTY CHANGES
Cyclic changes in sexually mature, nonpregnant females
MENSTRUAL CYCLE
regular events that occur in the ovaries of sexually mature, non pregnant women during the menstrual cycle.
Ovarian Cycle
2 phases of ovarian cycle
follicular and luteal phase
changes that occur primarily in the endometrium of the uterus during the menstrual cycle;
Uterine Cycle
3 phases of uterine cycle
menses, proliferative, secretory phases
3 phases of uterine cycle
menses, proliferative, secretory phases
Stimulates secretion in LH and FSH
Gonadotropin-releasing hormones
Causes follicles to complete maturation and undergo ovulation; causes ovulation; causes the ovulated follicle to become the corpus luteum
Luteinizing Hormone
Causes follicles to begin development
Follicle-stimulating hormone (FSH)
- Proliferation of endometrial cells
- Development of mammary glands (especially duct systems)
- Positive feedback before ovulation, resulting in increased LH and FSH secretion; negative feedback with progesterone on the hypothalamus and anterior pituitary after ovulation, resulting in decreased LH and FSH secretion
Estrogen
- Enlargement of endometrial cells and secretion of fluid from uterine glands; maintenance of pregnant state
- Development of mammary glands (especially alveoli)
- Negative feedback, with estrogen, on the hypothalamus and anterior pituitary after ovulation, resulting in decreased LH and FSH secretion
- Secondary sexual characteristics
Progesterone
Contraction of uterine smooth muscle and contraction of cells in the breast, resulting in milk letdown in lactating women
Oxytocin
Maintains corpus luteum and increases its rate of progesterone secretion during the first one-third (first trimester) of pregnancy; increases testosterone production in testes of male fetuses
Human chorionic gonadotropin
- The Female sex drive, no refractory period
- The erectile tissue become engorged as autonomic nerves are stimulated causing the glands to secrete mucus and lubricating fluids
FEMALE SEX ACT
- 40–50 years old; cessation of menstrual cycles.
- gradual changes in response to the reduced amount of estrogen and progesterone.
MENOPAUSE
size and weight of the testes decrease
sperm cell production is reduced
Erectile dysfunction increases
decreases in the frequency of sexual activity
reproductive aging effects in men
menopause
uterus decreases in size, and the endometrium decreases in thickness
vaginal wall becomes thinner and less elastic
reproductive aging effects in female
Hair distribution
Skin texture
Body fat distribution
Skeletal muscle growth
Changes in larynx
Secondary sexual characteristics of testosterone
MALE HORMONES
Gonadotrophin-releasing Hormone
Gonadotropins
Luteinizing Hormone
Follicle Stimulating Hormone
Testosterone
Inhibin
FEMALE HORMONES
Gonadotrophin- releasing hormone
Luteinizing Hormone
Follicle-stimulating Hormone
Estrogen
Progesterone
Oxytocin
Human Chronic gonadotropin
spermatic cord consists of?
ductus deferens
testicular artery
testicular veins
testicular nerve
what forms the ejaculatory duct?
seminal vesicle and ampulla of ductus deferens
divide the mitosis
Spermatogonia
divide meiosis
Primary spermatocytes
last phase of spermatogenesis
Spermatids