Flashcards
Bio Exam 3; Chapter 17
Cards in this deck (29)
- 1fertilizationunion of a sperm and egg to form a zygote, the first cell of that new individual.
- 2cleavageimmediately after fertilization, the zygote begins to divide..each cell receives a full complement of chromosomes and genes.
- 3growthduring embryonic development, cell division is accompanied by an increase in size of the daughter cells.
- 4morphogenesisrefers to the shaping of the embryo and is first evident when certain cells are seen to move, or migrate, in relation to other cells.
- 5differentiationwhen cells take on a specific structure and function; the first system to become visibly differentiated is the nervous system.
- 6pre-embronic developmentencompasses the events of the first week
- 7embryonic developmentbegins with the second week and lasts until the end of the second month
- 8morulacompact ball of embryonic cells that become a blastocyst.
- 9blastocystis a structure formed in the early development of mammals. It possesses an inner cell mass (ICM) which subsequently forms the embryo.
- 10inner cell massthe many cells of a blastocyst arrange themselves so that there is an ___ surrounded by an outer layer of cells.
- 11choriondevelops into the fetal half of the placenta, the organ that provides the embryo/fetus with nourishment and oxygen and takes away its waste.
- 12allantoislike the yolk sac, extends away from the embryo. It accumulates the small amount of urine produced by the fetal kidneys and later gives rise to the urinary bladder.
- 13yolk sacthe first embryonic membrane to appear.
- 14amnionenlarges as the embryo and then the fetus enlarges. It contains fluid to cushion and protect the embryo, which develops into a fetus.
- 15implantationat the end of the first week, the embryo usually begins the process of implanting itself in the wall of the uterus.
- 16human chorionic gonadotropin (HCG)chorion secretes this.. the hormone that is the basis for the pregnancy test.
- 17gastrulationa major event that turns the inner cell mass into the embryonic disk.
- 18primary germ layerscells migrate to become tissue layers
- 19chorionic villia bosy stalk (future umbilical cord) connects the embryo to the chorion, which has tree like projections called the ___.
- 20umbilical cordconnects the developing embryo to the placenta.
- 21fonatelsthe skull has 6 large membranous areas called ___.
- 22lanugothe wrinkled, translucent skin is covered by a fine down called ___.
- 23testosteroneproduced by the testes stimulated the Wolffian ducts to become male genital ducts.
- 24Braxton Hicks ContractionsFalse labor contractions are called ____
- 25incontinenceIn the pelvic cavity, compression of the ureters and urinary bladder can result in stress _____, or the involuntary leakage of urine from the urinary tract.
- 26parturitionprior to or at the first stage of ____,the process of giving birth , can be a bloody show cause by expulsion of a mucous plug from the cervical canal.
- 27effacement"taking up the cervix" ; when the cervical canal slowly disappears as the uterus is pulled upward towards the baby's head.
- 28episiotomyto enlarge the vaginal orifice.
- 29gerontologythe study of aging
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- Flashcards on Bio Exam 3; Chapter 17, created by minisade on 15/04/2015.
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