Summary
Testicular interstitial cells in ddN mice aged 3 to 28 days were studied with the electron microscope. They differed from those in adult mice in several respects:
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1)
Agranular endoplasmic reticulum and granular endoplasmic reticulum were mixed in the youngest animals, while they were separated topographically in 28 day mice.
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2)
Mitochondria were usually round between 3 to 10 days, while oval or rod-shaped mitochondria predominated in 28 day animals. Intramitochondrial granules were absent between 3 to 10 days but were occasionally observed in the older animals.
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3)
Glycogen particles were occasionally arranged in irregular clusters in 3 day old animals, while these structures were absent in the older animals.
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4)
Membranous whorls were recognized only in 28 day mice.
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5)
Villous processes on the cell surface facing the perivascular space were poorly developed in the youngest animals, while in 28 day mice they were as prominent as in the adult mouse.
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Ichihara, I. The fine structure of testicular interstitial cells in mice during postnatal development. Z. Zellforsch. 108, 475–486 (1970). https://doi.org/10.1007/BF00339654
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DOI: https://doi.org/10.1007/BF00339654