The structural pattern of the pineal gland in the hen corresponds to a more advanced stage of the evolution which began in an early period of the animal’s life. This evolution corresponds mainly to the transformation of the large follicular cavities into cellular ‘rosettes’. The parafollicular layer disappears from the rosette wall which thus remains with only one row of cells (A and B pinealocytes). The cellular hypertrophy and the great development of the pinealocyte organelles in the adult pineal gland makes us think of this gland as a functionally active organ. This functional activity must have remained during the entire period of the time studied (1–5 years), due to the ultra-structural uniformity found and due to the fact that we could not observe any type of degenerative process in th
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机译:母鸡松果体的结构模式对应于进化的更高级阶段,该阶段始于动物生命的早期阶段。这种进化主要对应于大卵泡腔向细胞“玫瑰花结”的转变。滤泡旁层从玫瑰花结壁上消失,因此仅保留一排细胞(A 和 B 松果体)。成人松果体中松果体细胞器的细胞肥大和巨大发育使我们认为该腺体是一个功能活跃的器官。由于发现的超微结构均匀性以及我们无法观察到任何类型的退行性过程,这种功能活性必须在整个研究期间(1-5 年)保持。
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