system • Female baby develops if tdf is not present. • Tdf – a gene located on Y chromosome; if girl‚ then two X chromosomes‚ hence no Tdf. • Female hormones: progesterone and estrogen ( both secreted by mother’s ovaries and placenta which allow female genetilia to develop. Parts of the female reproductive system: Oviduct/Fallopian tube – site of fertilization Ovary – produce and release ova and female sex hormones Uterus – receives and nurtures embryo during development
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Re 7B Reproduction About the Unit This Unit covers human reproduction and development. The Unit starts with an overview of what reproduction is and considers different modes of reproduction in animals. Human reproductive organs are then covered‚ along with adaptations of sex cells. This is followed by a look at sexual intercourse‚ the menstrual cycle‚ pregnancy and birth. The Unit ends with puberty and adolescence‚ a stage which many pupils will be going through or just about to
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The baby’s body is torn apart. Since the suction is much stronger than a home vacuum cleaner‚ the placenta is well connected to the uterus line which is also torn away. The D&C method is similar to the suction procedure. The abortionist inserts a curette and a loop shaped steel knife into the uterus and scrapes the wall. Scraping is concentrated where he encounters resistance. He cuts the placenta and the baby into pieces and either scrapes or suctions them out into a basin. This method generally
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The Difference between Identical and Fraternal Twins Article Body Because fraternal‚ or dizygotic‚ twins are 2 separate fertilized eggs‚ they usually develop 2 separate amniotic sacs‚ placentas‚ and supporting structures. Identical‚ or monozygotic‚ twins may or may not share the same amniotic sac‚ depending on how early the single fertilized egg divides into two. If twins are a boy and a girl‚ clearly they are fraternal twins‚ as they do not have the same DNA. A boy has XY chromosomes and a girl
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Section 51-1 VOCABULARY REVIEW 1. Target cells are the specific cells that are affected by a hormone. 2. A second messenger is an intracellular molecule that amplifies the signal of a first messenger. 3. A prostaglandin is a lipid that regulates the activity of cells that are in close proximity to its site of production. 4. Hormones are molecules that are secreted in small amounts‚ circulate in the bloodstream‚ and affect distant target cells. MULTIPLE CHOICE 1. d 2. c 3. a 4. c 5. c SHORT ANSWER
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cervix is completely dilated and the baby moves through the cervix and the birth canal.Contractions come every minute.After the baby is born. Placental stage: lasts only minutes. occurs after baby is born and is when the uterine contractions break the placenta free of the endometrium and deliver it out of the body‚ also know as afterbirth.
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Spermatogenesis Spermatogenesis is the production of the male gametes (reproductive or sex cell) otherwise known as sperm. The production of sperm takes place in the seminiferous tubules within the testes and are formed from cells by a type of cell division called mitosis and then meiosis. This process begins at puberty. Spermatogonia cells are made by mitotic division of the primordial germ cell. Mitotic cell division produces diploid cells that are identical to the Parent cell with 46 chromosomes
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Healthy Diet and Lifestyle in Pregnancy Pre-conception A women’s health and nutritional status before she becomes pregnant are known to affect her health and the health of the foetus during pregnancy. Women who are planning to get pregnant are advised to eat a balanced diet before they conceive. A diet which is lacking in any nutrient may worsen when a women becomes pregnant e.g. a diet which is low in iron before pregnancy may lead to iron deficiency anaemia during pregnancy Pregnancy Why is
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state was identified. A PICTURE DESCRIBING “PREECLAMPTIC STATE” 20TH CENTURY: THEORIES ON DISEASE CAUSATION: Although the researches failed to identify the etiology‚ the pathophysiology was better understood.In 1960‚ dramatic difference in placenta of preeclampsia and a normal one was identified. It was discovered that placental trophoblasts failed to invade the uterine spiral arteries in preeclampsia‚ causing VASOSPASM AND PLACENTAL
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Until the mid-nineteenth century‚ childbirth was a completely natural experience‚ in which women would endure the tiresome pain of labor without the use of anesthetics or drugs to get her through birth (Hyde & DeLamater 2014). The use of anesthetics and drugs during childbirth was a controversial topic then and even to this day‚ with women outweighing the short-term and long-term costs and benefits of the drugs on themselves and on their children. While natural childbirth is still an option chosen
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