Difference between revisions of "Corpus Luteum - Anatomy & Physiology"
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* This protrusion of tissue and ruptured blood vessels forms a structure known as the '''Corpus Haemorrhagicum'''. | * This protrusion of tissue and ruptured blood vessels forms a structure known as the '''Corpus Haemorrhagicum'''. | ||
* Following this, the theca interna and granulosa cells differentiate into large and small luteal cells. | * Following this, the theca interna and granulosa cells differentiate into large and small luteal cells. | ||
+ | ** Luteal cells contain increased quantities of lipid droplets and the pigment 'lutein'. | ||
* As the blood is resorbed, a solid '''Corpus Luteum''' is formed by proliferation of granulosa and theca intera cells as well as blood vessels. This remains on the surface of the ovary. | * As the blood is resorbed, a solid '''Corpus Luteum''' is formed by proliferation of granulosa and theca intera cells as well as blood vessels. This remains on the surface of the ovary. | ||
* In the non-pregnant animal, corpora lutea are transient structures. | * In the non-pregnant animal, corpora lutea are transient structures. | ||
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* Corpora lutea produce progesterone. | * Corpora lutea produce progesterone. | ||
* Progesterone prepares and maintains the [[Female_Reproductive_Tract_-The_Uterus_-_Anatomy_%26_Physiology|uterus]] for implantation of the [[Reproductive_System_-_Anatomy_%26_Physiology#Fertilisation.2C_Implantation_and_Early_Embryonic_Development|fertilised]] ovum. | * Progesterone prepares and maintains the [[Female_Reproductive_Tract_-The_Uterus_-_Anatomy_%26_Physiology|uterus]] for implantation of the [[Reproductive_System_-_Anatomy_%26_Physiology#Fertilisation.2C_Implantation_and_Early_Embryonic_Development|fertilised]] ovum. | ||
+ | * The number of corpora lutea formed are directly related to the number of oocytes released. | ||
=== [[The Ovary - Corpus Luteum Formation - Anatomy & Physiology|Corpus Luteum Formation]] === | === [[The Ovary - Corpus Luteum Formation - Anatomy & Physiology|Corpus Luteum Formation]] === | ||
=== [[The Ovary - Corpus Luteum Regression- Anatomy & Physiology|Corpus Luteum Regression]] === | === [[The Ovary - Corpus Luteum Regression- Anatomy & Physiology|Corpus Luteum Regression]] === |
Revision as of 20:36, 12 September 2008
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- When the dominant antral follicle ovulates, slight localised haemorrhage occurs at the site of ovulation and fills the former cavity.
- The small amount of bloody tissue can be observed by the naked eye.
- Loss of fluid from the antral cavity causes the follicle to collapse into many folds.
- As a result, some granulosal and thecal layers are pushed into the apex of the ruptured follicle.
- This protrusion of tissue and ruptured blood vessels forms a structure known as the Corpus Haemorrhagicum.
- Following this, the theca interna and granulosa cells differentiate into large and small luteal cells.
- Luteal cells contain increased quantities of lipid droplets and the pigment 'lutein'.
- As the blood is resorbed, a solid Corpus Luteum is formed by proliferation of granulosa and theca intera cells as well as blood vessels. This remains on the surface of the ovary.
- In the non-pregnant animal, corpora lutea are transient structures.
- Cyclic corpora lutea undergo proliferation and vascularisation directly after ovulation.
- The corpora lutea then regress and degenerate into a connective tissue scar, the Corpus Albicans.
- If the ovum is fertilised, the corpus luteum remains fully developed and active throughout at least part of the pregnancy.
- Corpora lutea produce progesterone.
- Progesterone prepares and maintains the uterus for implantation of the fertilised ovum.
- The number of corpora lutea formed are directly related to the number of oocytes released.