prenatal development and birth
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Created by:
ltychapman on January 24, 2010
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Description:
stark state
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18 terms
Terms | Definitions |
|---|---|
 cephalocaudual pattern | growth that proceeds from the head downward |
| proximaodistal pattern | growth that proceeds from the middle of the body outward |
| germinal stage | first stage of prenatal development: conception and implantation |
| implantation | attachment of the blastocyst to the uterine wall |
| placenta | specialized organ that allows substances to be transferred from the mother to the embryo |
| umbilical cord | organ that connects the embryo to the placenta |
| amnion | fluid filled sac in which the fetus floats until just before birth |
| embryonic stage | second stage of prenatal development/ 2wks-8wks embryos organ system form |
| neurons | specialized cells of the nervous system |
| organogenesis | process of organ development |
| fetal stage | 3rd stage of development/ 9wks-birth growth and organ refinement take place |
| viability | ability of the fetus to survive outside the womb |
| cell body | part of the neuron that contains the cell body and is the site of vital cell function |
| synapse | tiny spaces across which neural impulses flow from one neuron to the next |
| axons | tail-like extensions of neurons |
| dendrites | branchlike protrusions from the cell bodies of neurons |
| glial cells | the glue that holds neurons together to form the structures of the nervous system |
| teratogens | substances such as viruses and drugs that can cause birth defects |
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