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Answer the following questions based on human reproduction - Leaving Cert Biology - Question 17 - 2022
Question 17
Answer the following questions based on human reproduction. (i) The placenta forms from tissues of the mother and the embryo. Give two roles of the placenta. (ii)... show full transcript
Worked Solution & Example Answer:Answer the following questions based on human reproduction - Leaving Cert Biology - Question 17 - 2022
Step 1
Give two roles of the placenta.
Answer
- The placenta facilitates the movement of nutrients and oxygen from the mother to the fetus, which are essential for fetal growth and development.
- It also acts as an excretory organ, removing waste products from the fetus's blood back to the mother's circulation.
Step 2
Give an outline description of the birth process, including the role of hormones.
Answer
The birth process, or parturition, begins when the body prepares for labor. One key hormone involved is oxytocin, which stimulates uterine contractions. During labor, the mucus plug is expelled, and the amniotic fluid may break, leading to uterine contractions that cause the cervix to dilate. The baby is pushed through the birth canal after full dilation, and the umbilical cord is cut after delivery.
Step 3
Step 4
Step 5
State two biological benefits of breastfeeding.
Answer
- Breastfeeding provides essential nutrients and antibodies that help to build the infant's immune system, offering protection against infections.
- It also promotes bonding between the mother and infant due to skin-to-skin contact and emotional exchange.