senses Flashcards
what are the 2 optic nerves
thick bundles of millions of individual fibre nerves
what happens during week 4 of vision
cells from developing brain tissue form two optic nerves
what is the retina and what does it do
the layer of cells at the back of the eye that percieves and processes light
when does the retina form
week 8
when does light vs dark occur
week 16
when does development of the ear canal begin and end
development starts 2 or 3 weeks after conception and completes after 6 weeks
what are the 2 functions of the ear
balance and hearing
what is the function of the cochlea
hearing nerve carries sound signals to the brain
when do taste buds form
week 8
what is the first taste
salty amniotic fluid
when do olfactory neurons form
week 6-7 develop in the brain
what is somato sensory
network of touch receptors throughout the body that connect back to the brain through nerve cells
what happens in week 8 (touch)
facial touch receptors, mostly on lips and nose
how is touched measured in utero
a fetus reacts to touch with a change in heart rate or hormone levels
