a long time ago, in a bed room far far away...... this happened
DESCRIPTION
Following Daddy’s big finish he releases millions of potential you’s. The mini you’s swim up Mommy’s fallopian tube until they meet your future apartment for the next 9 months.TRANSCRIPT
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A Long time ago, in a bed room far far away...... THIS HAPPENED
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Censored
OH! That was awesome.
.....Alright
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Following Daddy’s big finish he releases millions of potential you’s. The mini you’s swim up Mommy’s fallopian tube until they meet your future apartment for the next 9 months.
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Ah!
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Fertilizing Sperm
Polar Body
FIMBRIA (supplies nutrients to the
uterus
Fallopian Tube (carries the egg from the oviduct to the uterus
Ovary (produces sex hormones and eggs)
Note that the sperm cells are oversized in this diagram, the
egg is actually 1000 times larger then any sperm
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Sperm Nucleus
Egg Nucleus
Fallopian Tube
Once the sperm has successfully made its way into the egg, it will now add its 23 chromosomes with the other 23 chromosomes contained in the egg nucleus.
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Fusion of Egg and Sperm cell
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Cell Division begins(Cleavage)
Zygote- the zygote receives 23
chromosomes from the sperm cell and 23 chromosomes from
the oocyte
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Morula (approx. Day3. cells are packed tightly
together)
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In the first 0-1.5 weeks of the first trimester the zygote divides multiple times and then implants
itself in the uterus.
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Blastocyst (contains a mass of undifferentiated
cells. Approx. Day 5)
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The blastocyst implants itself along the wall of the uterus(endometrium) so it can further develop
Endometrium
Uterus (provides a place for the egg to
develop
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EmbryoblastBlastocyst
cavity
Trophoblast
trophoblast
Forming yolk sac
Amniotic cavity
Endometrium (blastocyst implants
and develops on wall)
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Enlarged blood vesselsForming
Chorion
Ectoderm Amniotic cavity
Yolk Sac
Connecting stalk
Mesoderm
Endoderm (yellow)
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Note: this process does not happen as quickly as presented in
slide.
Allontis
Umbillical cord
Placenta (allows nutrient uptake
and waste removal
Eyes, ears internal organs and extremities begin to develop and
form over the next few weeks.
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In week 8-10 joints begin to form the baby has begun movement. Average size is .9 inches and the
weight is .07 ounces
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Week 12-Nearly all the organs are formed and have started to function. Fingers and toes are now not webbed. Gonads start
differentiate and start to form because of the x and y chromosomes. Hormones that are circulating in the blood also determine the outward characteristics of the fetus. If too much
estrogen is present in a male then he will develop female physical traits. This begins in week 8.
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Second Trimester (weeks14-20)- sex now distinguishable, heart-beat can be heard. Movement is now recognized and brain has developed so that it swallow, suck and make irregular breathing
movements. A fine hair is now covering the whole body.
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Week 28-32: the baby is capable of surviving outside the uterus if lungs can breath properly. There is a 10%- 20% survival if born at
week 28. at week 32 the survival rate goes up to 50%. The average size is 41 cm long, and 1680 g.
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Week 30- 40: the baby is the same size as the placenta, and there is a 94% chance of survival is born at the 36th week. The full term
baby is an average size of 51 cm long and 3400 g in weight
Placenta
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Role of Hormones• Estrogen- responsible for the formation of liver, lung, kidney, and adrenal
glands. It also helps in the development of sexual traits, helps in the process of lactation, regulates bone density and helps blood flow between the mother and the baby
• Progesteron- it helps maintain the role of the placenta, protects form any damaging cells, prevents sudden uterine contractions until the baby is fully developed and prevents lactation until the baby is born
• Oxytocin- helps the uterus contract and stimulates the mammary glands to produce milk.
• HGC- stimulates the production of estrogen and progesterone which keeps the body from releasing another egg. This stops menstruation and keeps the fertilized egg in the uterus.
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