REPRODUCTIVE SYSTEM Flashcards
Gametes
The germ or “seed” cells
Female gametes
Ovum (ova plural) / egg
Male gametes
Spermatoza/ sperm
Gametes produced in?
Gonads
Female gonads
Ovaries
Male gonads
Testes
Primary sex characteristics
Directly related to the growth and function of the reproductive system itself
Secondary sex characteristics
Refer to those “masculine” and “feminine” body features, such as beard growth and breast development
Fertilization
The fusing of ovum and sperm
Gender differentation begins at what fetal age?
2 month
How do ova and sperm cells differ from other body cells?
They carry only half the usual number of chromosomes.
External male genitalia
Penis
Scrotum
Internal male genitalia
Testes
Duct system
Accessory glands
The specialty area of medicine that treats male urinary and reproductive disorders is called…..
Urology
The penis is the male sex organ composed of three parts:
Shaft
A tip called the glans
A cuff of skin called the prepuce (or foreskin)
Erection of the penis:
Arteries bring blood into the penis. This pressure squeezes against the veins, preventing blood from going out again. The penis becomes engorged with blood, causing the erectile tissue of the penis to become firm.
Ejaculation
Ejaculation of semen occurs when sexual arousal reaches a peak, known as orgasm
A skin-covered sac called the ______contains two testes (or testicles)
Scrotum
Spermatogenesis
Origin and development of the sperm cells
Spermatozoa
A mature male germ cell (sperm)
Where do the testes originally develop in the embryo?
Abdominal cavity
Testes descend to the scrotum a couple month before birth through which passage?
inguinal canal
Where are the sperm-manufacturing cells are located?
In 250 lobules/ They hold the seminiferous tubules
Leydig cells in the testes produce a class of hormones called….
Androgens
Epididymis
A highly convoluted duct behind the testis, along which sperm passes to the vas deferens.
16-foot-long tube coiled tightly into a two-inch space along the length of the testicle
Which part of the sperm contains the genetic material?
The “head region”
The tail of the semen is called?
Flagellum
Each ejaculation of semen contains approximately how many sperm?
300 million
(Male reproductive) The duct system includes four parts:
Epididymis
Vas deferens
Urethra
Ejaculatory ducts
The epididymis performs two functions:
Storing sperm produced in the seminiferous tubules
Continuing to develop the sperm
vas deferens (ductus deferens)
Firm, hollow tube that carries sperm straight through the spermatic cord.
The seminal fluids contained in semen are secreted by the
accessory sex glands
Seminal fluid consists of?
Proteins
Minerals
Fructose
Enzymes
Mucus
Citric acid
The main accessory glands of the male reproductive system include?
Seminal vesicles
Prostate gland
Cowper’s glands
Seminal fluid comes from?
Seminal vesicles
Prostate
Cowper’s glands (Bulbourethral glands)
Erectile dysfunction (ED)/Impotence
An inability to achieve or maintain an erection for sexual intercourse.
Causes for ED/Impotence
Physical:
- Disease
- Injury
- Side effects of certain medications
Psychological:
- Depression
- Stress
- Fear of sexual failure
Diseases that may cause erectile dysfunction include:
- Hypertension
- Diabetes
- Abnormal hormone production
Medications such as beta blockers and antidepressants
Impotence
Any male condition that interferes with reproduction.
Besides ED, other forms of it include ejaculation problems, low sperm count, or lack of sexual desire.
Medications used to treat erectile dysfunction (ED):
Sildenafil citrate (Viagra)
Vardenafil (Levitra)
Tadalafil (Cialis)
Avanafil (Stendra)
All of these medications can cause hypotension.
Patients taking bp mediction should avoid taking these medicatons.
Sildenafil and vardenafil are taken…?
30 -60 minutes prior to sexual activity
Lasts up to 4 hours
Tadalafil is longer-acting and lasts up to ?
36 hours
Avanafil is faster-acting, usually taken ______before sexual activity?
15-30 minuts prior
Priapism
Disorder in which an erection persists for more than four hours without stimulation.
Treatment Priapism
Aspiration of blood from the penis
Medications such as phenylephrine and surgical interventions when necessary.
Priapism causes
Can be caused by certain medications, such as the drugs given for erectile dysfunction. It can also be caused by the use of some recreational drugs, such as cocaine.
Untreated, this condition can cause ….
Damage to blood vessels in the penis, blood clotting, and ischemia (restriction of blood supply), which can lead to gangrene. Priapism generally requires emergency room admission.
What is the largest cell in the human body?
The ovum
A female is born with ____ immature sex cells.
1 million
How many ova (eggs) will be released during puberty and menopause ?
350-500
Usually, only one ovum a month leaves the ovary and travels down the fallopian tube, where it may meet up with a sperm. This process is called
Ovulation
At times, more than one ovum may be released, especially when using certain fertility treatments; the fertilization of two ova will result in
fraternal or dizygotic twins
If one ovum is fertilized and splits to form two embryos, it will result in
identical twins
How long does sperm live?
About 48 hours after ejaculation.
How long do ova live?
24 hours after ovulation
When does intercourse need to occur for fertilization to occur?
1 day before ovulation
On the day of ovulation
1 day after ovulation
The medical specialty that treats the female reproductive system actually has two components called
obstetrics and gynecology.
The obstetrics component deals with
Pregnancy and childbirth
The gynecologic component deals with
Diseases and illnesses of the female reproductive tract.
The female reproductive organs include the:
- Ovaries
- Fallopian tubes
- Uterus
- Vagina
- Acessory glands
Menstruation
the process of discarding old tissue so that fresh ones can be prepared for the next potential embryo.
The ovaries are located….
On each side of the uterus.
Ovaries contain thousands of tiny sacs called…
Graafian follicles
Ovulation
After the onset of puberty, once a month, a Graafian follicle ruptures and a mature ovum leaves the ovary for the journey down the fallopian tube.