Talk:Book - Outlines of Chordate Development 2

From Embryology
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Chapter Ii The Early Development Of The Frog


Introduction . . . . 62


I. Outline Of The Life History Of The Frog .... 63


Ii. The Germ Cells And Their Production 68


A. The Egg And Sperm At The Time Of Spawning . . 68


B. The Formation Of The Germ Cells 71


1. The Reproductive Organs 71


2. Oogenesis 73


3. Spermatogenesis 77


C. Spawning 77


Iii. The Embryonic Period 79


A. From Fertilization Through Gastrulation .... 79


1. Fertilization And The Development Of The Symmetry Of The Egg 79


2. The Symmetry Of The Egg 83


3. Cleavage 91


4. The Blastula 94


5. Gastrulation And Notogenesis 98


6. The Mesoderm 107


7. The Medullary Plate 110


8. Summary And Comparisons With Other Forms Ill


B. The Formation Of The Early Embryo 116


1. The Nervous System 116


2. The Notochord 121


3. The Enteron 122


4. The Mesoderm . 123