Test 2.2 Flashcards
Vno
Vomer nasal organ, pits in the back of nose
Where do we produce pheromones
Armpits, skin, genatalia
When is the vaginal secretion most pleasant to men when?
Ovulation
Found out by rubbing vaginal secretions all over the body
Essence of Geneviene
Took arm pit secretions during menstruation and rubbed the secretion on the upper lip of these women
Took t shirts experiment?
20 men wear shirts for three days. Out shirts in boxes and had women smell it.
MHC-
Major histo compadability complex
Tied to pheromones
Immune system complexity
We are attracted to the opposite?
MHC. Mice attract different MHC
Acrosome-
Enzyme that eats through the egg. Only one gets through or there would be to much chromosomes
Zygote
Begins to divide 2 ball stage - cells 4 ball stage - cells - solid ball of cells= morula - gastrulation= filled with blastocyste
In the embryonic disk creates?
Endoderm- form digestive organs, reproductive organs
Mesoderm- form muscles, heart
Ectoderm- skin, brain, spinal chord
When the embryo grows
Genitalia- look identical until about 3 months and change from the hormones produced by the mother
Vertebrates
Mammals Fish Reptiles Birds Amphibians All have a vertebrae, tail, pharyngeal become gills, inner ear, jaw bones in reptiles
Amnion-
Sac around the fetus
Amniotic cavity
Fluid fills to protect fetus
Chorion-
Placenta, or oxygen exchange organ