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Pollution II3 Topics1 Quiz
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Conservation of Natural Resources6 Topics1 Quiz
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Reproductive System in Vertebrates I5 Topics1 Quiz
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Reproductive System in Vertebrates II (Mammals)4 Topics1 Quiz
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Reproductive System in Vertebrates III (Comparison of Reproduction in Vertebrates)4 Topics1 Quiz
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Reproductive System in Plants2 Topics1 Quiz
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Topic Content:
- Meaning of Placentation
- Types of Placentation
Placentation refers to the arrangement or the position of ovules in the ovary. The ovules are found in chambers called loculi (sing. loculus) which may be separated from one another by partitions known as septa. The ovules in the chambers are attached to the placenta which can be found at the centre of the ovary or along the ovary wall.
An ovule is attached to the placenta by a short stalk called the funicle.
Types of Placentation:
There are different types of placentation. These are marginal, axile, parietal, free-central, basal, and apical placentation.
1. Marginal Placentation: In this
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