lecture 8 2011

lecture 8 2011 - Ovary Leftsideinbirds...

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Ovary Left side in birds # Oocytes in chicken embryos 28,000 on 9 th  day of development 680,000 on 17 th  day of development 480,000 at hatching (day 21) Immature bird 2000 visible oocytes (follicles) 250-500 reach maturity in domestic bird; even  less in wild species
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Ovary Blood supply Supplied via the ovarian artery Greatest to 5 largest follicles Usually 2-4 individual branches go to one  follicular stalk Stigma
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Follicular Structure Basal lamina No direct blood supply  below this layer.   Diffusion Inner perivitelline  layer Made of protein After ovulation: Layers above = stays to  form POF 
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Follicular layers Theca Theca externa/interna Contains Highly vascular Innermost cells produce steroids Fibroblasts (greatest number, provide framework) Nerve fibers Actin contracting cells
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Follicular Layers (cont.) Basal Lamina 1 mm in thickness Composed of: Collagen Glycoprotein Fibronectin
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Follicular Layers (cont.) Granulosa Avascular Cuboidal then squamous Many layers to single layer of cells
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Follicular Layers (cont.) Inner perivetelline layer Plasma membrane of the ovum
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lecture 8 2011 - Ovary Leftsideinbirds...

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