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Explain each of the following: (i) placenta ________________________________________________ ______________________________________________________________ (ii) menstruation ______________________________________________ ______________________________________________________________ - Junior Cycle Home Economics - Question 12 - 2008
Question 12
Explain each of the following: (i) placenta ________________________________________________ ______________________________________________________________ (ii) m... show full transcript
Worked Solution & Example Answer:Explain each of the following: (i) placenta ________________________________________________ ______________________________________________________________ (ii) menstruation ______________________________________________ ______________________________________________________________ - Junior Cycle Home Economics - Question 12 - 2008
Step 1
(i) placenta
Answer
The placenta is an essential organ that develops in the womb during pregnancy. It serves multiple critical functions:
- Provides Oxygen and Nutrients: The placenta facilitates the transfer of oxygen and nutrients from the mother to the developing baby. This is vital for the growth and development of the fetus.
- Removal of Waste: It also plays a critical role in removing waste products produced by the fetus, ensuring a healthy environment for development.
- Barrier Function: Additionally, the placenta acts as a barrier, filtering harmful substances and pathogens that could adversely affect the baby.
Step 2
(ii) menstruation
Answer
Menstruation is a physiological process that occurs in females, involving the shedding of the uterine lining when pregnancy does not take place. The main points are:
- Cycle Overview: Each month, the lining of the uterus thickens in preparation for a potential pregnancy.
- Breakdown of Lining: If the egg is not fertilized, hormonal changes signal the body to break down this lining, leading to its disintegration.
- Release: This lining, along with blood, is then released from the body through the vagina, resulting in what is known as menstrual flow.