Fine Structure of the Granulosa Lutein Cells of Pregnancy in Carnivora
The ultrastructure of granulosa lutein cells of pregnancy from 10 raccoons ( Procyon lotor ), 8 crabeater seals ( Lobodon carcinophagus ), 3 black bears (Ursus americanus), a palm civet ( Paradoxurus hermaphroditus ) and a dog ( Canis familiaris ) was studied. Fetuses ranged from 10-130 mm crown rum...
| Published in: | Proceedings, annual meeting, Electron Microscopy Society of America |
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| Main Author: | |
| Format: | Article in Journal/Newspaper |
| Language: | English |
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Cambridge University Press (CUP)
1973
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| Subjects: | |
| Online Access: | http://dx.doi.org/10.1017/s0424820100073192 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0424820100073192 |
| Summary: | The ultrastructure of granulosa lutein cells of pregnancy from 10 raccoons ( Procyon lotor ), 8 crabeater seals ( Lobodon carcinophagus ), 3 black bears (Ursus americanus), a palm civet ( Paradoxurus hermaphroditus ) and a dog ( Canis familiaris ) was studied. Fetuses ranged from 10-130 mm crown rump length (CR) in raccoons, 15-180 mm CR in seals, 150-190 mm CR in bears, H O mm CR in civet and near term in dog. The cells possess abundant smooth endoplasmic reticulum (ER), variable amounts of mitochondria with tubular and lamellar cristae, a small amount of lipid droplets and folded plasma membranes (Figs. 1-5) much as in other steroid-secreting tissues. However, variations in the arrangements of smooth ER, mitochondria, lipid droplets and plasma membranes are observed throughout pregnancy. For example, in the civet plasma membranes have a few folds but they are highly specialized and complexly folded in the seals and raccoons especially near the capillaries (Fig. 3). |
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