_____ secretes a fluid that makes up most of the components of the semen.
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hormone inhibin
The ________ stops the release of GnRH and FSH, which will cause spermatogenesis to slow down.
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Testosterone
________ negatively feedback to the hypothalamus and pituitary to decrease the production of GnRH and LH.
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negative feedback system
A(n) ________ occurs in the male with rising levels of testosterone acting on the hypothalamus and anterior pituitary to inhibit the release of GnRH, FSH, and LH.
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male gonads
The ________ are the testes (singular: testis) hanging in the scrotum.
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LH
________ also enters the testes and stimulates the interstitial cells of Leydig to make and release testosterone into the testes and the blood.
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Corpus luteum
________ secretes estrogen and progesterone.
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Estrogen
________ secreted at low levels during most of the cycle.
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Immature follicles
________ have receptors for FSH but not LH.
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seminal fluid
Semen, also known as ________, is much more than just sperm.
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scrotum
The ________ contains two testes (testicles) where sperm are manufactured within tubes called seminiferous tubules, and the two epididymides where sperm are stored.
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sperm begin
Inside each tubule, ________ as blob- like cells called spermatogonia lining the inner wall.
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female egg maturation
Unlike ________, which occurs in cycles and ceases at menopause, sperm production is continuous, reducing gradually with age.
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male
Unlike the ________, the female reproductive organs are located entirely inside the body.
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Androgen
________ and Testosterone: affects primary and secondary sexual characteristics.
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Mature follicle
________ have receptors for LH.
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Corpus luteum
________ secretes estrogen and progesterone.
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tail
Sperm develop in the testes and consist of a head, a midpiece, and a(n) ________.
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Follicular tissue
________ develops into corpus luteum.
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menstrual cycle
During each ________, follicle- stimulating hormone (FSH) causes one egg to begin development; this takes place inside a primary follicle.
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presence of LH
Synthesize hormones and produce testosterone in the ________.
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FSH
________ enters the testes and stimulates the Sertoli cells to begin facilitating spermatogenesis using negative feedback.
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front section
The head contains the nucleus with densely coiled chromatin fibers (chromosomes), with a(n) ________- the acrosome that contains enzymes for penetrating the female egg.
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human ejaculation
There are around 200 to 500 million sperm in an average in a single male ________.
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new individual
Nurtures the development of and provides nourishment for the ________.
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Egg fertilization
________ usually occurs in the ampulla, the eggs then travel through the isthmus to the uterus.
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Sperm production
________ requires a slightly lower temperature than the human body that is why the scrotum hangs loosely outside the body cavity.
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Stimulate spermatogenesis
________: sperm production in sertoli cells (lifetime process)
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Granulosa cells of follicle
________ secretes estrogen.
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vulva
The ________ and its structures form the external genitalia.
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vagina
The ________ extends down from the cervix, the lower part of the uterus, to the vestibule, which is part of the vulva and the external genitalia.
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uterine lining
The blastocyst attaches to the wall of the uterus and gradually implants itself into the ________.
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female reproductive glands
The ________ (ovaries) are located within the abdomen.
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internal genitalia
The ________ includes a three- part system of ducts: the uterine tubes, the uterus, and the vagina.
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egg travels
The ripe ________ along the fallopian tube to the uterus, the muscular sac in which it develops into an embryo and then fetus.
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egg cells
The ovaries produce ________ and release them for fertilization.
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seminiferous tubules
Each testis is a mass of more than 800 tightly looped and folded vessels known as ________.
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Bulbourethral gland
________ (Cowpers gland)- secretes a thick and clear mucus that lubricates and neutralizes any trace of acidic urine in the urethra.
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Prostate gland
________- secretes a slightly alkaline milky fluid that is discharged as part of the semen.
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Sperm
________ is only about 5 to 10 % of any given male single ejaculation and the rest is fructose (aka sugar), fatty acids, and proteins to nourish the ________ during their journey.
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Rate of release
________ is increased (peaked) when approaching ovulation.
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Sertoli cells
________: FSH stimulates spermatogenesis.
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Follicle cells
________ produce the hormone inhibin which stops FSH production.
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500 inch
A sperm is about 1 /________ long, but most of this is a tail.
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LH
A surge of luteinizing hormone (________) causes the follicle to rupture and release the ripe egg- this is ovulation.
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Estrogen
________ also stimulates thickening of endometrium.
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LH
________ luteinizes remaining follicular tissue into corpus luteum.
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corpus luteum
Luteinizes the follicle into the ________.
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Corpus luteum
________ secretes female hormones.
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the male gonads are the testes (singular
testis) hanging in the scrotum
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the two oval-shaped testes (also called testicles) lie outside the body in a pouch of skin called the scrotum, where they can maintain the optimum temperature for sperm production
approximately 5° F, lower than body temperature
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the head contains the nucleus with densely coiled chromatin fibers (chromosomes), with a front section
the acrosome that contains enzymes for penetrating the female egg
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Seminal vesicle
secretes a fluid that makes up most of the components of the semen
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Prostate gland
secretes a slightly alkaline milky fluid that is discharged as part of the semen
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Bulbourethral gland (Cowpers gland)
secretes a thick and clear mucus that lubricates and neutralizes any trace of acidic urine in the urethra
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the internal genitalia includes a three-part system of ducts
the uterine tubes, the uterus, and the vagina
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no eggs are manufactured after birth
a female is born with a full set
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THE VAGINA
A TUNNEL WITH THREE CORE FUNCTIONS
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a surge of luteinizing hormone (LH) causes the follicle to rupture and release the ripe egg
this is ovulation
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the lining of the empty follicle thickens into a corpus luteum
a temporary source of hormones
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FERTILIZATION
A SPERM AND AN EGG FORM A ZYGOTE
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THE ZYGOTE BECOMES AN EMBRYO
DEVELOPMENT PRIOR TO AND DURING IMPLANTATION
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stimulate spermatogenesis
sperm production in sertoli cells (lifetime process)
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Hypothalamus
Gonadotropin-releasing hormone (GnRH)
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Anterior Pituitary
Gonadotropic hormones FSH and LH
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Sertoli cells
FSH stimulates spermatogenesis
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Leydig cells
LH stimulates hormone secretion
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Androgen and Testosterone
affects primary and secondary sexual characteristics
Studied by 114 people
