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==Human Pronuclear Stage - Pronuclear Envelope== | ==Human Pronuclear Stage - Pronuclear Envelope== | ||
* The space between the two sheets of the pronuclear envelope is zonally enlarged due to blebbing of the outer sheet toward the cytoplasm ( | * The space between the two sheets of the pronuclear envelope is zonally enlarged due to blebbing of the outer sheet toward the cytoplasm (c). | ||
* Spheroidal or elongated vesicles are contained in these dilated regions. | * Spheroidal or elongated vesicles are contained in these dilated regions. | ||
* The vesicles are bound by membranes which arc always distinct from the pro- nuclear envelope. | * The vesicles are bound by membranes which arc always distinct from the pro- nuclear envelope. |
Revision as of 23:36, 23 February 2012
Human Pronuclear Stage - Pronuclear Envelope
- The space between the two sheets of the pronuclear envelope is zonally enlarged due to blebbing of the outer sheet toward the cytoplasm (c).
- Spheroidal or elongated vesicles are contained in these dilated regions.
- The vesicles are bound by membranes which arc always distinct from the pro- nuclear envelope.
- The vesicles are similar to the small ER vesicles present in the cytoplasm.
- They may represent cndoplasmic reticulum components which have become associated with the pronuclei (PN).
Fig. 14, X 28,500. Figs. 15 and 16, X 104,000.
- Pronuclear Stage EM: | Human pronuclei | Human pronuclei | Mitochondria | Mitochondria | Endoplasmic Reticulum | Endoplasmic Reticulum | Endoplasmic Reticulum | Cytoplasmic LameIlae | Cytoplasmic LameIlae | Crystalline inclusions | Crystalline inclusion | Pronuclear Envelope | Pronuclei Annulate Lamellae | Pronucleus | Nucleoli | Spermatozoon | Human pronuclei | Spermatozoon Components | Golgi complex | First Polar Body | First Polar Body | First Polar Body | Second Polar Body | Second Polar Body | pronuclei | polar body | fertilization | Carnegie stage 1
Reference
<pubmed>6008199</pubmed>| PMC2107024 | J Cell Biol.
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