Term
Where does fertilization occur? How? |
|
Definition
fallopian tube sperm + egg nuclei meet |
|
|
Term
what is cleavage? where does it occur? |
|
Definition
cleavage is early cell division it occurs in the fallopian tubes |
|
|
Term
|
Definition
| specialized group of cells |
|
|
Term
when does implantation occur? what is it? |
|
Definition
around day 7 blastocyst barries into endometrium |
|
|
Term
what is the role of hCG?
where is it secreted from? where does it act? |
|
Definition
hCG stimulates the corpus luteum to produce progesterone and estrogen. it is secreted from the chorion (outer layer around embryo) it acts on the corupus luteum |
|
|
Term
|
Definition
| development of the 3 germ layers |
|
|
Term
|
Definition
outter layer brain, skin, nervous system, hair, etc. |
|
|
Term
|
Definition
inner layer digestive system, respiratory system, etc. |
|
|
Term
|
Definition
middle layer muscles, blood vessels, bones, etc. |
|
|
Term
|
Definition
| nervous system formation in ectoderm |
|
|
Term
| what forms from the allantois |
|
Definition
|
|
Term
| what is the role of the amnion |
|
Definition
| fluid: protection, temp. regulation, etc |
|
|
Term
| what is the role of the chorion |
|
Definition
produces placenta secretes hCG |
|
|
Term
| what is the role of the yolk sac |
|
Definition
| makes red blood cells until liver formation |
|
|
Term
what is the placenta? what does it develop from? |
|
Definition
a flat organ high blood vessel concentration used to transport nutrients, O2, teratogens develops from chorion flat = increased SA |
|
|
Term
what is the umbilical cord? what does it develop from? |
|
Definition
cord with high blood vessel concentration for transport develops from allantois |
|
|
Term
| what are the major events in the first trimester |
|
Definition
|
|
Term
| what are the major events in the second trimester |
|
Definition
|
|
Term
| what are the major events in the third trimester |
|
Definition
| repiratory development, fat building, increase in size |
|
|
Term
| what is the role of oxytocin in parturition |
|
Definition
| increases uterin contractions |
|
|
Term
| what is the role of prostaglandina in parturition |
|
Definition
| increase uterin contractions |
|
|
Term
| what is the difference between prolactin and oxytocin in lactation |
|
Definition
prolactin: produces milk oxytocin: milk ejection |
|
|
Term
| what is invitro fertlization |
|
Definition
female is given superovulatory drugs eggs are removed sperm sample is taken eggs + sperm mixed to fertilized implantation |
|
|
Term
|
Definition
intra cytoplasmic sperm injection sperm screened 1 is chosen injected into egg's cytoplasm |
|
|
Term
| what is the early source of nutrients for the developing embryo |
|
Definition
| cytoplasm ofthe egg - until implantation |
|
|
