Reproductive system
P.7 Gabriela Perez
gonads
ovaries
tests
male internal
Testes
seminiferous tubules are lined with stratified epithelium that contains spermatognic cells that give rise to sperm cells
interstitial cells (cells of leydig) between the seminiferous tubules and produce the male sex hormone
epididymis which continues into the ductus deferens ( vas deferens)
an epididymis
nurture and transport the sperm cells
a ductus defernes
a semial vesicle
prostate gland
bullbourethral glands
male external
scrotum pouch of skin and subcutaneous tissue that houses the tests
penis cylindrical organ that conveys both urine and semen to the outside
corpora coivernosa and corpus spongiosum
glans penis which is covered by a loose fold of skin (prepuce)
erction orgasm and ejaculation
Ejaculation involves forcing of semen through the urethra to outside of body
emission involves movement of sperm cells and accessory gland secretions into the urethra where they blend to form semen, controlled by sympathetic impulse
flaccid state
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sprematogenesis
spermatogenesis (sperm production) is now arrested until puberty
sertoli cells support, nourish, and regulate the spermatogenic cells
Structure of a sperm cell
head contains haploid nucleus and acrosome
acrosome contains digestive enzymes that erode tissues surrounding females egg cell
midpiece (body) containing mitochondria
Flagellum (tail)
Hypothalamic and pituitary hormone
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Gonadotropin releasing hormone
Lutenizing hormone promote development of interstitial cells of the testes which then secrete male hormone (testosterone)
follicle stimulating hormone stimulates sertoli cells of seminiferous tubles to repond to testosterone
Male sex hormones
Actions of testosterone stimulates development of male reproductive organs
Androgens male sex hormone testosterone is most important one
responsible for male secondary sexual characteristics
Ovaries structure
cortex contains ovarian follicles and is covered by cuboidal epithelium
medulla is made up of connective tissue blood vessels, lymphatis vessels and nerves
female Internal
Near ovaries they expand to form an infundibulum with a fingerlike fimbriae on its margins
uterine tubes ( oviducts or fallopian tubes) leads from the ovary to the uterus
cells lining the tubes have cilia which beat on unison drawing egg cell into the uterine tube
site of fertilization
Organs
uterine tube conveys secondary oocytes toward uterus, sit of fertillization, conveys developing embro to uterus
ovary produce oocytes and female sex hormones
uterus protects and sustains embryo during pregnancy
vagina is outside of body
labia majora enclose and protect other external reproductive organs
labia minora form margins of vestibule, protect openings of vagina and urethra
clitoris produce feelings of pleasure during sexual stimulation due to abundant sensory nerve endings in glams
vestibule space between labia minora that contains vaginal and urethal openings
vestibular glands secrete fluid that moistens and lubricates vestibule
follicle maturation
Primary oocyte t surrounding layers is the egg
the cell grows to about 10 mm and the primary oocyte is now surrounded by a clear layer the zona pellcicida and several layers of follicular cells, the corona radiata
female sex hormones
progesterone (nonpregnant) which triggers uterine changes during the menstrual cycle
estrogens is secondary sexual characterisis
Androgens also play a role