Advertisements
Advertisements
प्रश्न
What changes occur at the time of birth?
Advertisements
उत्तर
A cycle of uterine contractions followed by labour pains, dilation of the cervix and the vagina slowly pushes the fetus out of the uterus. The uterine contractions are initiated by decreased progesterone secretion and the secretion of oxytocin hormone by the pituitary gland. After the child's delivery, the placenta is expelled out.
APPEARS IN
संबंधित प्रश्न
State whether the following statements are TRUE (T) or FALSE (F):
Rewrite the wrong statement by correcting only one word either at the beginning or at the end of the sentence.
Nutrition and oxygen diffuse from the mother’s blood into the foetus’s blood through amnion.
Describe briefly the ways how a mammalian embryo is respires
Name the Following
A hollow pear-shaped muscular organ that holds, nourishes and protects the fetus.
Complete the following sentences with appropriate word:
The placenta is ________permeable
Complete the following sentences with appropriate word:
The expulsion of the fetus from the body to the mother in a human female is called __________.
Write the functional activity of the following structure:
Uterus
All are functions of placenta, EXCEPT ______.
How are carbon dioxide and urea, excreted by the foetus, removed?
Heart and blood vessels have been formed by the end of five weeks of pregnancy.
Given below is the name of certain stage/substance related to reproduction and found in human body. Answer the questions related to it.
Foetus.
- Where is it contained?
- How does it differ from embryo?
