The elements of Embryology (1889) The elements of Embryology elementsofembryo00fostuoft Year: 1889 322 THE MAMMALIAN EMBRYO. Fig. 103. [chap. Embkyonic Area of a Seven Days' Embryo Rabbit. (From Kolliker.) 0. place of future area vasculosa ; rf. medullary groove ; pr. pri- mitive streak ; ag. embryonic area. In the region o. a layer of mesoblast lias already grown ; there are however as yet no signs of blood-vessels in it. This mesoblast is derived from the mesoblast of the primitive streak (Kolhker). iu the axial line with the primitive hypoblast. When the medullary groove is formed the l
The elements of Embryology (1889) The elements of Embryology elementsofembryo00fostuoft Year: 1889 322 THE MAMMALIAN EMBRYO. Fig. 103. [chap. Embkyonic Area of a Seven Days' Embryo Rabbit. (From Kolliker.) 0. place of future area vasculosa ; rf. medullary groove ; pr. pri- mitive streak ; ag. embryonic area. In the region o. a layer of mesoblast lias already grown ; there are however as yet no signs of blood-vessels in it. This mesoblast is derived from the mesoblast of the primitive streak (Kolhker). iu the axial line with the primitive hypoblast. When the medullary groove is formed the lateral bands of mesoblast become separate from the axial hypoblast and give rise to two independent lateral plates of mesoblast
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