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4th week

inaudible heart beats

Embryonic Period (2nd week)

-implantation,-yolk sac,-heart is two tubes

1st week (1st lunar month)

-fertilization,-cell cleavage (or cell division), -morula---->gastrula----->blastula-amnion (amniotic fluid) and chorion


mucous lining of the uterus, layer which thickens each month in anticipation of receiving fertilized egg-----> mucous membrane

Embryonic Period

ferilization through 8th week (through the 2nd lunar month or 56th day)


study of human anatomy before birth


structures in the nucleus of a cell that contains the genes (responsible for heredity) for genetic expression


embryonic/fetal membrane that surrounds the amnion

Dominant Gene

a gene that produces a recognizable effect in the organism


deoxyribonucleic acid, the molecular basis for heredity, it is present in chromosomes


ball-like mass of cells in the embryonic period with fluid-filled (amniotic fluid) center


vessel that carries blood away from the heart


embryonic/fetal membrane which gives rise to the amniotic fluid surrounding the baby

Adult-hood period

adolescence to old age

Adolescence Period

"teenagers"- puberty to adulthood


mullberry-like mass of cells, the result of the early cell divisions of the zygote

Lunar Month

28 days of 4 weeks (not a calendar month)


fine downy-like hair on the fetus that begins to appear during the 5th month of prenatal developement and begins to disappear before birth


when the father places the sperm in the mothers body


union of the sperm and egg

Fertilized egg

zygote, after the sperm and the egg unite

Male Gamete

male sex cell, sperm, spermatozoa, spermatozoon, or "the seed"


the female sex cell, the egg


the male sex cell


"seed" the male sex glands that produce the sperm,- found in the scrotal sac or scrotum,- sperm, spermatozoa (outside the body), - spermatozoon (inside the body)

Uterine Tube

fallopian tube, where fertilization generally takes place


exit passageway to the outside of the mothers body


fertilized egg

Ectopic Pregnancy (Tubal Pregnancy)

anytime a fertilized egg attempts to develope outside of the uterus. most common is a tubal pregnancy

Fallopian Tube or Uterine Tube

connects between the ovary and the uterus. this is where fertilization usually takes place


riboneucleic acid, a component of all living cells, it carries the information from the DNA to the protein forming areas of the cell


the sudden active movements of the fetus (about the 5th month)

Recessive Gene

a gene that does not produce a recognizable effect in the organism


when a woman is carrying a baby (fertilization to birth)


the part of the embryonic mass that attaches itself to the uterus (of the mother)

Neonatal Period

newborn- birth through 4th week

Fetal Period

from the 9th week- (3rd lunar month or the 57th day) through birth


ball-like mass of cells in the embryonic period with hollow center


portion of a DNA molecule, the hereditary unit occupying a fixed position in the chromosome, capable of reproducing itself at each cell division and of managing the formation of protein

Gestation Period

the time required for prenatal developement

Heart Beats (Audible)

when the heartbeats can be heard with a stethoscope during the 4th/5th lunar month (fetal)

Heart Beats (Inaudible)

when the heart actually begins to beat durint the first lunar month of developement (embryo)


when the ferilized egg has attached itself to the wall of the uterus (endometrium)

Infancy Period-Infant

end of 4th week to one year

Senescence Period

"old" age to death

Umbilical Chord

the attachment to the placenta (and mother) by the baby in utero, -contains 2 arteries, 1 vein, and whartons jelly

Witch's Milk

fluid from the undeveloped mammary glands of new born babies (male and female)

Whartons Jelly

jelly-like substance surrounding the umbilical vessels

Vernix Caseosa

vanish-like, cheese-like substance on the fetus to protect it from the amniotic fluid


vessel which carries blood towards the heart

Uterus (Fundus,Body, and Cervix)

chamber in mothers body in which the baby developes after the egg has implanted itself

Childhood Period

one year to puberty

6th Month( Fetal Period)

verniz caseosa (varnish-like sheesy substance covering the fetus)

5th week (2nd Lunar Month)

primitive aorta divides into aorta and pulmonary trunk

5th month (Fetal Period)

-quickening (sudden fetal movements) -audible heart beats -lanugo (downy-like hair covering fetus

3rd Calendar Month (Fetal Period)

-hair developes -placenta is in operation

9th week (3rd lunar month)

kidneys are formed

8th week

spleen developes

7th week

heart has four chambers

6th week

-umbilical vessels are present -2 arteries, 1 vein, and whartons jelly


the middle primary germ layer, gives rise to; muscle tissue connective tissue (cartilage bones, lymph, and blood cells)


internal primary germ layer, gives rise to :epithelium of alimentary canal/digestive system (other than the mouth and anal canal) respitory system (other than the nose) urinary, bladder, and urethra


external primary germ layer, gives rise to the nervous tissue, epidermis and its appendages and linnings of mouth or anal canal

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