Describe the structure and role of placenta
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Placenta is a structure that establishes firm connection between the foetus and the mother. From the outer surface of the chorion a number of finger like projections known as chorionic villi grow into the tissue of the uterus. These villi penetrate the tissue of the uterine wall of the mother and form placenta.
The placenta performs the following functions:
1. Nutrition:
Food materials pass from the mother’s blood into the foetal blood through the placenta.
2. Digestion:
The trophoblast ol the placenta digest protein before passing them into foetal blood.
3. Respiration:
Through the placenta oxygen passes from the maternal blood to the foetal blood, and carbon dioxide passes from foetal blood to maternal blood.
4. Excretion:
Nitrogenous wastes such as urea pass from foetal blood into maternal blood through placenta and are filtered out by the kidneys of the mother.
Placenta is a structure that establishes firm connection between the foetus and the mother. From the outer surface of the chorion a number of finger like projections known as chorionic villi grow into the tissue of the uterus. These villi penetrate the tissue of the uterine wall of the mother and form placenta.
The placenta performs the following functions:
1. Nutrition:
Food materials pass from the mother’s blood into the foetal blood through the placenta.
2. Digestion:
The trophoblast ol the placenta digest protein before passing them into foetal blood.
3. Respiration:
Through the placenta oxygen passes from the maternal blood to the foetal blood, and carbon dioxide passes from foetal blood to maternal blood.
4. Excretion:
Nitrogenous wastes such as urea pass from foetal blood into maternal blood through placenta and are filtered out by the kidneys of the mother.
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HeY MaTe ------
Structure:
Placenta is a structure that establishes firm connection between the foetus and the mother.
From the outer surface of the chorion a number of finger like projections known as chorionic villi grow into the tissue of the uterus. These villi penetrate the tissue of the uterine wall of the mother and form placenta.
The placenta is a connection between foetal membrane and the inner uterine wall. Thus, placenta is partly maternal and partly embryonic. By means of placenta the developing embryo obtains nutrients and oxygen from the mother and gives off carbon dioxide and nitrogenous waste.
The placenta performs the following functions:
1. Nutrition:
Food materials pass from the mother’s blood into the foetal blood through the placenta.
2. Digestion:
The trophoblast of the placenta digest protein before passing them into foetal blood.
3. Respiration:
Through the placenta oxygen passes from the maternal blood to the foetal blood, and carbon dioxide passes from foetal blood to maternal blood.
4. Excretion:
Nitrogenous wastes such as urea pass from foetal blood into maternal blood through placenta and are filtered out by the kidneys of the mother.
5. Storage:
The placenta stores glycogen, fat etc. for the foetus before liver is formed.
6. Barrier:
Placenta functions as an efficient barrier (defensive wall) and allows useful: aerials to pass into the Social blood. Harmful substances such as nicotine from cigarette and addictive drugs such as heroin can pass through placenta. Therefore, pregnant women should avoid cigarette and drugs. Viruses and bacteria can pass through placenta.
7. Endocrine function:
Placenta functions as an endocrine gland it secretes hormones such as oestrogen, progesterone and human chorionic gonadotropin (HCG).
Hope you liked the information...
I tried my best ...To make U Understand.
Structure:
Placenta is a structure that establishes firm connection between the foetus and the mother.
From the outer surface of the chorion a number of finger like projections known as chorionic villi grow into the tissue of the uterus. These villi penetrate the tissue of the uterine wall of the mother and form placenta.
The placenta is a connection between foetal membrane and the inner uterine wall. Thus, placenta is partly maternal and partly embryonic. By means of placenta the developing embryo obtains nutrients and oxygen from the mother and gives off carbon dioxide and nitrogenous waste.
The placenta performs the following functions:
1. Nutrition:
Food materials pass from the mother’s blood into the foetal blood through the placenta.
2. Digestion:
The trophoblast of the placenta digest protein before passing them into foetal blood.
3. Respiration:
Through the placenta oxygen passes from the maternal blood to the foetal blood, and carbon dioxide passes from foetal blood to maternal blood.
4. Excretion:
Nitrogenous wastes such as urea pass from foetal blood into maternal blood through placenta and are filtered out by the kidneys of the mother.
5. Storage:
The placenta stores glycogen, fat etc. for the foetus before liver is formed.
6. Barrier:
Placenta functions as an efficient barrier (defensive wall) and allows useful: aerials to pass into the Social blood. Harmful substances such as nicotine from cigarette and addictive drugs such as heroin can pass through placenta. Therefore, pregnant women should avoid cigarette and drugs. Viruses and bacteria can pass through placenta.
7. Endocrine function:
Placenta functions as an endocrine gland it secretes hormones such as oestrogen, progesterone and human chorionic gonadotropin (HCG).
Hope you liked the information...
I tried my best ...To make U Understand.
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