Attachment of foetus to placenta occurs through
(a) Chorda mesoderm
(b) Spinal cord
(c) Umbilical cord
(d) Notochord

Options

A. Chorda mesoderm
B. Spinal cord
C. Umbilical cord
D. Notochord.

Answer

To solve the question about how the attachment of the fetus to the placenta occurs, we can analyze each option provided:

1. **Understanding the Question**: The question asks how the fetus attaches to the placenta during pregnancy. This attachment is crucial for the exchange of nutrients and waste between the mother and the fetus.

2. **Evaluating the Options**:
- **(a) Chorda mesoderm**: This is a type of mesoderm associated with the development of the neural tube but does not play a role in the attachment of the fetus to the placenta.
- **(b) Spinal cord**: The spinal cord is part of the central nervous system and does not have any role in the attachment of the fetus to the placenta.
- **(c) Umbilical cord**: This is a tube-like structure that connects the fetus to the placenta. It contains blood vessels that transport nutrients and oxygen from the mother to the fetus and carry waste products away from the fetus. This is the correct answer.
- **(d) Notochord**: The notochord is a primitive structure that contributes to the formation of the vertebral column but does not function in the attachment of the fetus to the placenta.

3. **Conclusion**: Based on the analysis of the options, the correct answer is **(c) Umbilical cord**. This structure is essential for the attachment of the fetus to the placenta and facilitates the necessary exchanges between the mother and the developing fetus.