The Placenta. Allows female mammals to carry the young inside their bodies during early development. Allows female mammals to carry the young inside their.

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Presentation transcript:

The Placenta

Allows female mammals to carry the young inside their bodies during early development. Allows female mammals to carry the young inside their bodies during early development. During pregnancy, the developing foetus receives all its nutrients via the placenta. During pregnancy, the developing foetus receives all its nutrients via the placenta. All the waste products in the foetuss blood are removed via the placenta. All the waste products in the foetuss blood are removed via the placenta. The placenta also produces hormones. The placenta also produces hormones. The Placenta

The placenta consists of thousands of tiny branched fingers of tissue called CHORIONIC VILLI these project into the endometrium. The maternal blood vessels surrounding the chorionic villi break down forming maternal blood sinuses The Placenta

Diagram showing chorionic villi

The Placenta Table showing exchange of materials across the placenta Mother to FoetusFoetus to Mother Oxygen Glucose Amino acids Lipids, fatty acids & glycerol Vitamins Ions; Na, Cl, Ca, Fe Alcohol, nicotine + other drugs Viruses Antibodies Carbon dioxide Urea Other waste products

The Placenta