Inside the mother’s body, the embryo gets nourishment through the placenta, a unique organ that connects the developing embryo to the uterine wall. The placenta facilitates the transfer of oxygen and nutrients from the mother’s bloodstream to the embryo. It also removes waste products from the embryo’s blood. This exchange is critical for the growth and development of the embryo throughout pregnancy.

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Formation of the Placenta

The placenta forms shortly after conception, developing from the same fertilized egg that becomes the embryo. It attaches to the wall of the uterus and establishes a connection between the mother and the developing embryo.

This organ is vital for the embryo’s growth and development, as it serves as the interface for the exchange of nutrients, oxygen, and waste products.

Nutrient Transfer to the Embryo

The placenta plays a crucial role in transferring nutrients from the mother to the embryo. Nutrients such as glucose, amino acids, fatty acids, vitamins, and minerals pass from the mother’s bloodstream through the placenta to the embryo. This transfer is essential for the energy and building blocks needed for the embryo’s growth and development.

Oxygen Supply and Waste Removal

Oxygen is vital for the embryo’s development and is supplied via the placenta. The mother’s blood, rich in oxygen, flows to the placenta, where oxygen is transferred to the embryo’s blood. Simultaneously, carbon dioxide and other waste products from the embryo are transferred back to the mother’s blood through the placenta, effectively removing waste from the embryo’s system.

Hormonal Support and Immune Protection

The placenta also produces hormones necessary for maintaining pregnancy, such as progesterone and human chorionic gonadotropin (hCG). These hormones help sustain the uterine lining and support the embryo’s growth. Additionally, the placenta provides a form of immune protection, filtering out some harmful substances that might pass from the mother to the embryo.

The Umbilical Cord: A Vital Link

The umbilical cord, connecting the embryo to the placenta, is the physical lifeline that carries blood, rich in nutrients and oxygen, to the embryo. It comprises two arteries and one vein encased in a jelly-like substance, providing a protected pathway for the essential exchange of substances between the mother and the embryo. This connection is crucial for the embryo’s survival and development throughout the pregnancy.

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Questions of Class 10 Science Chapter 7 in Detail

What is the importance of DNA copying in reproduction?
Why is variation beneficial to the species but not necessarily for the individual?
How does binary fission differ from multiple fission?
How will an organism be benefited if it reproduces through spores?
Can you think of reasons why more complex organisms cannot give rise to new individuals through regeneration?
Why is vegetative propagation practised for growing some types of plants?
Why is DNA copying an essential part of the process of reproduction?
How is the process of pollination different from fertilisation?
What is the role of the seminal vesicles and the prostate gland?
What are the changes seen in girls at the time of puberty?
How does the embryo get nourishment inside the mother’s body?
If a woman is using a copper-T, will it help in protecting her from sexually transmitted diseases?
What are the advantages of sexual reproduction over asexual reproduction?
What are the functions performed by the testis in human beings?
Why does menstruation occur?
Draw a labelled diagram of the longitudinal section of a flower.
What are the different methods of contraception?
How are the modes for reproduction different in unicellular and multicellular organisms?
How does reproduction help in providing stability to populations of species?
What could be the reasons for adopting contraceptive methods?