NEET PG DENTAL EXAM

EMBRYOLOGY

FERTILISATION EARLY DEVELOPMENT OF EMBRYO AND IMPLANTATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What structure protects and cushions the fetus throughout its prenatal development?
A
amniotic sac and fluid
B
placenta
C
umbilical cord
D
vagina
Explanation: 

Detailed explanation-1: -A thin-walled sac that surrounds the fetus during pregnancy. The sac is filled with liquid made by the fetus (amniotic fluid) and the membrane that covers the fetal side of the placenta (amnion). This protects the fetus from injury.

Detailed explanation-2: -Amniotic fluid is responsible for: Protecting the fetus: The fluid cushions the baby from outside pressures, acting as a shock absorber. Temperature control: The fluid insulates the baby, keeping it warm and maintaining a regular temperature. Infection control: The amniotic fluid contains antibodies.

Detailed explanation-3: -The amniotic sac and its filling provide a liquid that surrounds and cushions the fetus. It is a site of exchange of essential substances, such as oxygen, between the umbilical cord and the fetus. It allows the fetus to move freely within the walls of the uterus. Buoyancy is also provided.

Detailed explanation-4: -The amniotic fluid constantly moves (circulates) as the baby swallows and “inhales” the fluid, and then releases it. The amniotic fluid helps: The developing baby to move in the womb, which allows for proper bone growth. The lungs to develop properly.

There is 1 question to complete.