Anatomy of Apara (placenta) - A Review
Abstract
The placenta is almost circular disc and flat like structure. The matured placenta is 15-18cms in diameter, 23mm in thickness and about 500gms in weight. The placenta has two surfaces, maternal and foetal. The maternal surface is attached to endometrium whereas the foetal surface is covered with amnion which is white shiny and mottled in appearance. The maternal surface consists of 20 distinct lobules known as cotyledons. Each lobule consists group of villi. Which is separated by septum known as placental septum. The placenta store nutrients such as carbohydrates, proteins, calcium, iron etc. Which are released into the foetal circulation when are required. Through the placenta transportation of oxygen, water, electrolytes, nutrition from mother to foetus and waste products like urea, uric acid and carbon dioxide and other produced by foetus are excreted to the maternal blood. According to Ayurveda the placenta is formed by the accumulation of Rakta (Blood). When the orifices of minute Artavavaha Strotas are occluded by growing foetal mass, menstruation stops, because of same cause. Unexpelled Artava ascends up due to occlusion of down ward passage and accumulates to form Apara (Placenta).
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References
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