ANSWERS { GRADED A+}
Chromosomes - ✔✔XX Female
XY - Male
Sperm + Ovum = 46 Chromosomes
Who determines the sex of the baby M or F ? - ✔✔Male determines
gender.
Sex is determined when ? - ✔✔at Fertilization
Oogensis - ✔✔the production or development of an ovum.
,What effects sperm viability? - ✔✔The tail of the sperm
Gamete Life Span - ✔✔Ovum 24hrs
Sperm 4-5 days
How long does it take sperm to get up to the fallopian tube? -
✔✔5minutes
Zygote - ✔✔Cell formed by union of sperm + ovum transported through
fallopian tube aka the fertilized egg; it enters a 2-week period of rapid
mitotic division - cleavage.
2 cells - 4 cells - 8 cells = blastomere
Small cells continue to divide to a solid ball
Enters uterus day 3
,Floats 2-4 days
Embryo - ✔✔the developing human organism from about 2-8 weeks.
Fetus - ✔✔Developing infant at 9 weeks .
Age of viability is ? - ✔✔Week 20
Full term is considered how many weeks ? - ✔✔39-40weeks
Surfactant production begins at ? - ✔✔24 weeks
Fetal Circulation - ✔✔Ductus venosus → Ductus arteriosus -> Foramen
ovale
Ductus Venosus - ✔✔Diverts some blood away from the liver as it
returns from placenta.
Ductus Arteriosus - ✔✔diverts most blood from the pulmonary artery
into the aorta.
, Foremen Ovale - ✔✔Diverts most blood from the right atrium directly
to the left atrium, rather than circulating it to the lungs
Umbilical cord - ✔✔Life line between mother and fetus.
AVA -
2 arteries - carry blood away from fetus
1 Vein - return blood to fetus
Whartons Jelly- covers / cushions vessels.
Assessment -