BIOL 115 Lecture Notes - Lecture 4: Neural Groove, Neural Tube, Neural Plate
Document Summary
~200 cells day 6 (division picks up) Zygote travels to uterus and implants in the wall. Has to move form the fallopian tube where it is fertilized to the uterus. ~1/5th of one millimeter on day 14, size after 2 weeks. From gestational day (when pregnancy started) 15/week 3 through week 8. For humans prenatal development spans about 38 weeks in total. So far we"ve had a blastocyst in the first couple of weeks, and then around. Folding over of the ectoderm (the back cells) over which becomes this time it flattens and becomes a disc, then the disc folds in on itself the spinal cord. Creates a hole within itself, becomes the central canal of the spinal cord. Reason we have two sides to our nervous system is this folding, a. 33 days, flat fold over organism starts to curve around left and right part.
