Prenatal Development: A Timeline of Terms and Definitions, Quizzes of Health sciences

Download Prenatal Development: A Timeline of Terms and Definitions and more Quizzes Health sciences in PDF only on Docsity! TERM 1 periods of prenatal development DEFINITION 1 proliferative period (first 2 weeks) embryonic period (2-8 weeks) fetal period (8 weeks-birth) TERM 2 proliferatice period DEFINITION 2 first 2 weeks fertilization implantation embryonic disk forms TERM 3 embryonic period DEFINITION 3 2-8 weeks tissues and organs begin heart develops & beats at 4 weeks face and oral structures and 4-7 weeks TERM 4 fetal period DEFINITION 4 8 weeks-birth tissues differentiate & function growth TERM 5 week 1 DEFINITION 5 sperm meets egg DNA meets cell divides turns into a morula reaches and implants into uterus TERM 6 blastocyst DEFINITION 6 hollow with inner cell mass embryoblast w/ trophoblast lining TERM 7 ectoderm DEFINITION 7 AKA epiblast layer by the amniotic cavity will form epithelium and CNS will form neuroectoderm which forms the neural plate TERM 8 endoderm DEFINITION 8 AKA hypoblast by the yolk sac form a tube (GI tract) TERM 9 what pinches off to form CNS? DEFINITION 9 neural groove TERM 10 mesoderm forms DEFINITION 10 muscles skeleton dermis (made from somites) blood cells makes 38 pairs of somites on each side of CNS