Obstetrics And Gynaecology Reproduction In Men volume 2

Reproduction is the union of the male and female Gametes to form a Zygote. As it is common with other terrestrial animals, man has developed a more certain means of bringing the games together.

The sperm is produced in the numerous seminiferous tubules in the testes. From here it passed through the vasa efferentia and epididymis is into the vas deferens. For the sperm to be introduced into the female, it is necessary for the penis to be inserted into the vagina in an act of coitus or copulation. Under conditions of erotic excitement, the arteries in the penis dilate and the veins constrict.

Obstetrics And Gynaecology Reproduction In Men

The resultant high blood pressure in the penis causes the penis to become erect. As the penis moves up and down in the vagina, the tactile stimulation of the sensory cells at its tip triggers off a reflex.

  • Bladder
  • Spermatic cord
  • Uterus (Womb)
  • Prostate gland
  • Cooper's gland
  • Urethra
  • Sperm duct-
  • Right testis
  • Penis
  • Kidney
  • Ureter
  • Oviduct (Fallo pain tube)
  • Funnel of Oviduct
  • Ovary
  • Uterus wall
  • Bladder
  • Caput epididymis
  • Cauda epididymis
  • Scrotal sac
  • Gubernaculum
  • Cervix
  • Urethra
  • Vagina
  • Valva

  1. Male Reproductive system
  2. Female Reproduction

This causes the contraction of the vas deferens. to learn more about Obstetric and Gynaecology read the volume 1 edition The sperm is then swept down into the urethra. Here it is mixed with secretions from both the seminal vesicles and the prostate gland. These secretions keep the sperm in a viable and motile state. The admixture of the sperm and secretion is called semen. 

The semen is expelled from the penis into the vagina by a powerful contraction of the urethra. This is called ejeculation ejaculation. The reflex mechanism that brings about erection and ejaculation inhibits urination.

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The sperm reaches the ovum at the upper part of the fallopian despite the fact that millions of sperm cells are produced, only a few reach the ovum; and of these few, only one sperm cell fertilizes an ovum.

After fertilization, the zygote moves down the fallopian tube by peristalsis. It takes about one week for the zygote to reach the uterus and before then it has divided mitotically embedding of the blastocyst in the uterus is called "Implantation". To form. Blastocyst. The after implantation the blastocyst continues to develop by cell division. As development continues the blastocyst is called the fetus". The fetus is enveloped by a protective membrane- the chorion and the amnion.

  • Acrosome
  • Nucleus
  • Head
  • Neck
  • Middle
  • Piece
  • Tai vi Flagellum

Male Spermatozoon

  1. Vitelline membrane
  2. Cytoplasm
  3. Nucleus
  4. Yolk granule
  5. Plasma membrane
  6. Female Ovum

The amnion is the inner membrane and it encloses a fluid-filled amniotic cavity which acts as a buffer for the fetus. Later the placentas formed in association with the walls of the uterus and it is connected to blood vessels that come into intimate association with each other and across the fetus by the umbilical cord. Within the placenta, fetal and material their walls exchange respiratory gases, food materials and

To accommodate the growing fetus, the uterus expands enormously vascularization. When the fetus reaches a certain age, birth or parturition and this is accompanied by the thickening of its walls and increased occur. 

Actually, for reproduction to occur in men, fertile sperm cells have to b introduced into the vagina of an ovulating woman with patent fallopian tubes and a uterus. From the above, it is obvious that not all sperm cells' nitrogenous waste takes place.

gestational period and it is nine months in man. The potency of the sperm cells: can fertilize an ovum. Certain qualities are used to measure the gestational period.

  1. Volume:- The normal volume ranges from one milliliter to six milliliters (1 - 6 ml).
  2. Mortality:- This should be equal to or greater than sixty percent in one hour or seventy percent in two hours (60% in one hour or 70% in two hours).
  3.  Count:- Equal to or greater than twenty million cells per milliliter of sperm produced. (> 20 million cells/ml).
  4. Morphology:- Equal to or less than twenty-five percent of abnormal forms (<25% abnormal forms).
  5. Pus Cell:-There should be no pus cells in sperm.

Two abnormalities are associated with sperm. These are Azoospermia and oligospermia. Azoospermia means there is no sperm cell at all in the semen. Oligospermia denotes the presence of sperm cells less than normal. Oligospermia :-Mild = 11-19 Millions/ml.

Moderate = 6-10 Millions/ml. Severe = Less than or equal to 5 Million/ml. The man as a rule must abstain from sexual intercourse for four days before producing semen for analysis.

The amnion is the inner membrane and it encloses a fluid-filled amniotic cavity which acts as a buffer for the fetus. Later the placentas formed in association with the walls of the uterus and it is connected to blood vessels that come into intimate association with each other and across the fetus by the umbilical cord. Within the placenta, fetal and material their walls exchange respiratory gases, food materials and

To accommodate the growing fetus, the uterus expands enormously vascularisation. When the fetus reaches a certain age, birth or parturition and this is accompanied by the thickening of its walls and increased occur. The time interval from fertilization to parturition is called the.

Actually, for reproduction to occur in men, fertile sperm cells have to be introduced into the vagina of an ovulating woman with patent fallopian tubes and a uterus. From the above, it is obvious that not all sperm cells' nitrogenous waste takes place. gestational period and it is nine months in man. the potency of the sperm cells: can fertilize an ovum. Certain qualities are used to measure the

  • Volume:- The normal volume ranges from one milliliter to six

milliliter (1 - 6 ml).

  • Mortality:- This should be equal to or greater than sixty percent in one an hour or seventy percent in two hours (60% in one hour or 70% in two hours).
  • Count:- Equal to or greater than twenty million cells per milliliter of sperm produced. (> 20 million cells/ml).
  • Morphology:- Equal to or less than twenty-five percent of abnormal forms (<25% abnormal forms).
  •  Pus Cell:-There should be no pus cells in sperm. Two abnormalities are associated with sperm. These are Azoospermia and oligospermia.
  • Azoospermia means there is no sperm cell at all in the semen.

Oligospermia denotes the presence of sperm cells less than normal. Oligospermia :-Mild = 11-19 Millions/ml. Moderate = 6-10 Millions/ml. Severe = Less than or equal to 5 Million/ml. The man as a rule must abstain from sexual intercourse for four day before producing semen for analysis.

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