An Introduction to Embryology

activity adult amino acids amniotic amphibians amputation animal pole archenteron becomes Biol blastema blastoderm blastomeres blastopore blastula blood vessels body brain branchial canal cartilage cavity chick embryo chromosomes cleavage coelom cortical cytoplasm differentiation dorsal aorta ear vesicle ectoderm embryo embryology endoderm epidermis epithelial epithelium experiments fertilization fibers Figure fold follicle cells formation frog gastrulation genes gland graft granules growth hormone inducing inductor insects invagination larva later layer limb liver mammals membrane mesenchyme mesoderm mesonephric duct messenger RNA metamorphosis molecule molt muscle nerve neural plate neural tube neurula normal notochord nucleus oocyte organ rudiments pharyngeal pouches pigment posterior presumptive primitive streak produced protein regeneration blastema region result ribosomes Roux Arch sea urchin somites spermatozoon spinal cord stage structure substances surface synthesis tadpoles tail telencephalon tion transplanted tubules vegetal pole vein ventral vertebrates vitelline vitelline vein yolk sac Zool