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trishrules
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aldosterone
enhances Na+ reabsorption at the collecting duct of the kidney
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aneuploidies
abnormal numbers of chromosomes that may occur as a consequence of abnormal meiotic division of chromosomes in gamete formation
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antidiuretic hormone aka arginine vasopressin
acts to conserve water by increasing the permeability of the collecting duct of the kidney
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blastocyst
at the 8 - 16 cell stage, the blastomere develops a central cavity and becomes a blastocyst
the cells on the outer layer differentiate to become trophoblasts
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blastogenic period
the first 4 weeks of human development
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blastomere/morula
in 2 to 4 days after fertilization, a fertilized oocyte undergoes a series of cellular divisions and becomes a blastomere or morula
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conception
the fertilization of an ovum by sperm
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decidua
the name given to the endometrium or lining of the uterus during pergnancy and the tissue around the ectopically located fertilized ovum
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embryonic period
begins with the folding of the embryonic disk (which is formed from the inner cell mass) in week 2 of development
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fetus
the term given to the conceptus after 8 weeks of life; it has a crown-rump length of 30 mm and a gestational age of 10 weeks. The fetal period continues until birth
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gestational age
the time calculated from the last menstrual period and by convention exceeds the developmental age by 2 weeks
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oocyte
the primitive ovum before it has completely developed
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primary oocyte
the oocyte at the end of the growth period of oogonium and beforet he first maturation division has occurred
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secondary oocyte
the larger of the two oocytes resulting from the first maturation division
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oogenesis
formation and development of the ovum
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oogonium
the primordial cell from which an oocyte originates
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organogenesis
occurs between 4 and 8 weeks after conception
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polar body
the small cell produced in oogenesis resulting from the divisions of primary and secondary oocytes
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preembryonic period
the first 2 weeks after fertilization
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pregenesis
the time period between the formation of germ cells and the union of sperm and egg
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puerperium
the period of up to 6 weeks after childbirth during which the size of the uterus decreases to normal
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residual volume
the volume of air that is inhaled and exhaled during normal quiet breathing
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tidal volume
the volume of air that is inhaled and exhaled during normal quiet breathing
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total lung capacity
the volume of gas contained in the lungs after a maximal inspiration
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vital capacity
the volume of gas that is exhaled from the lungs in going from total lung capacity to residual volume
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zona pellucida
inner, solid, thick membranous envelope of the ovum (vitelline memebrane, zona radiata)
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