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Anatomy of Reproduction

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Anatomy of Reproduction Exploring Reproductive Systems Male Reproductive Organs Testicles- Produce Sperm & Testosterone. There are two testicles present in male animals. – PowerPoint PPT presentation

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Title: Anatomy of Reproduction


1
Anatomy of Reproduction
  • Exploring Reproductive Systems

2
Male Reproductive Organs
  • Testicles- Produce Sperm Testosterone. There
    are two testicles present in male animals.
  • Sperm- Male sex cells
  • Testosterone- Causes the behavior appearance of
    an animal to be masculine.

3
Male Reproductive Organs
  • Epididymis- Storage site for sperm cells. The
    cells enter the epididymis from the testicle to
    mature.
  • There is a separate epididymis attached to each
    testicle.

4
Male Reproductive Organs
  • Scrotum- Two-lobed sac that contains and protects
    the two testicles regulates testicle
    temperature.
  • When the environment temp. is low, the scrotum
    contracts pulling the testicle into the body for
    warmth.
  • When the temp. is high, the scrotum relaxes,
    letting them hang away from the body.

5
Male Reproductive Organs
  • Vas Deferens- a transportation tube that carries
    the sperm containing fluid from each epididymis
    to the urethra.
  • Urethra- Large, muscular canal extending from the
    urinary bladder. Semen and urine move through the
    urethra to the end of the penis.

6
Male Reproductive Organs
  • Seminal Vesicles- Open into the urethra. They
    produce a fluid that protects and transports
    sperm.
  • Prostate gland- Produces a fluid that is mixed
    with the seminal fluid.
  • Cowpers Gland- Produces a fluid that moves down
    the urethra ahead of the seminal fluid to clean
    neutralize the urethra.
  • All of this mixed together is called SEMEN.

7
Male Reproductive Organs
  • Penis- Deposits semen within the female
    reproductive system.
  • The urethra is surrounded by spongy tissue that
    fills with blood when the male is sexually
    aroused.
  • This causes an erection that is necessary for
    copulation (mating).

8
Male Reproductive Organs
  • Sigmoid flexure- (found in bulls, rams boars)
    and the retractor muscle extend the penis from
    the SHEATH.
  • Sheath- A tubular fold of skin that protects the
    penis.

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10
Reproductive Anatomy
  • Exploring Female Reproduction

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16
Female Reproductive Organs
  • Ovary- Produces female gametes.
  • Gamete is a sex cell that can unite with other
    sex cells. These are called ova or eggs.
  • Ovaries also produce female sex hormones,
    estrogen progesterone.
  • Within each ovary there are tiny follicles. The
    eggs are produced in these follicles.

17
Female Reproductive Organs
  • Oviducts- Two tubes that carry the ova from the
    ovaries to the uterus. They are also called
    fallopian tubes.
  • They are close, but not attached to the ovaries.
    The funnel-shaped end of each oviduct is called
    the infundibulum.
  • At ovulation the follicle ruptures, releasing an
    egg that is caught by the infundibulum.

18
Female Reproductive Organs
  • Uterus- Y-shaped structure consisting of the
    body, two uterine horns and the cervix. The size
    and shape varies among species.
  • Animals who have large numbers during birth,
    typically have large horns and a small body.
  • Animals who have single or twin births have small
    horns and a larger body.
  • The fetus grows within the uterus, and that is
    where it remains until parturition (birth).

19
Female Reproductive Organs
  • Cervix-Composed of connective tissue that is the
    gateway between the uterus and the vagina.
  • Vagina- Serves as the female organ of copulation
    at mating and as the birth canal during
    parturition.

20
Female Reproductive Organs
  • Vulva- External opening of the reproductive and
    urinary systems.
  • Labia majora- Exterior, visible part of the
    vulva, consisting of two folds.
  • Labia minora- Two folds located just inside the
    labia majoria.
  • Clitoris- Sensory and erectile organ of the
    female, located just inside the vulva. Produces
    sexual stimulation during copulation.

21
Other Things to Know
  • When a sperm fertilizes the ova, a zygote is
    created.
  • Zygote- Fertilized egg cell.
  • Fertilization occurs in the oviduct.
  • 2-4 days after fertilization the cell will move
    to the uterus, where it will stay until
    parturition.

22
Reproduction Anatomy
  • Avian

23
Male Reproduction
  • Male poultry have testicles, but they are located
    inside the body, opposed to the scrotum.
  • The Vas Deferens carry the seminal fluid sperm
    cells to the Cloaca.
  • Cloaca- Enlarged part where the large intestine
    joins the end of the alimentary canal.

24
Male Reproduction
  • Alimentary Canal- Food carrying passage that
    begins at the mouth and ends at the vent.
  • Papilla- The organ in the wall of the cloaca that
    puts the sperm cells into the hens reproductive
    tract.

25
Female Anatomy
  • The chicken does have two ovaries and two
    oviducts.
  • Only the LEFT ovary oviduct function. The right
    is obsolete.
  • The OVA produced in the ovary turns into egg
    yolk.

26
Female Anatomy
  • The Oviduct has 5 parts.
  • Funnel- Receives the yolk from the ovary. The
    sperm a chicken receives stays here.
  • Magnum- Secrets the thick white of the egg. It
    takes around 3 hours for the white to be placed
    around the yolk in the magnum.

27
Female Anatomy
  • Isthmus- The yolk white move here, two shell
    membranes are placed around the yolk white. It
    takes 1.25 hours.
  • Uterus- The thin white outer shell are placed
    around the egg. It stays here for about 20 hours.

28
Female Anatomy
  • Vagina- From the uterus, the egg moves here. The
    egg stays here only a short time before it is
    laid. It takes about 25-27 hours to produce one
    egg.

29
How It Happens
  1. Male Papillae deposits sperm in the cloacal wall
    of he female.
  2. Sperm moves up the oviduct to the funnel, where
    it is fertilized.
  3. Sperm Cells remain the oviduct 2-3 weeks after
    mating.

30
Other Things
  • The YOLK provides nourishment, just like an
    umbilical cord in mammals. It also provides
    passive immunity, like colostrum.
  • The egg white is called an ALBUMIN.
  • It serves as a shock absorber for the developing
    embryo.
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