Organisms with amnion also possess other foetal membrance

Options

A. Zona pellucide, vitelline menbrne
B. Choroid, vitelline membrane
C. Zona pellucide, chorion
D. Allanotois, chroin

Answer

**Step-by-Step Solution:**

1. **Understanding Fetal Membranes**:
- Fetal membranes, also known as extra-embryonic membranes, are structures that support the developing embryo. They have various functions, including protection, nutrient transfer, and waste elimination.

2. **Identifying the Amnion**:
- The amnion is one of the key fetal membranes. It is a protective sac that surrounds the embryo, filled with amniotic fluid, which cushions the embryo and allows it to move freely.

3. **Recognizing Amniotes**:
- Organisms that possess an amnion are referred to as amniotes. This group includes mammals and birds, which have adapted to reproduce in terrestrial environments.

4. **Other Fetal Membranes**:
- Besides the amnion, there are two other significant fetal membranes: the chorion and the allantois.
- **Chorion**: This membrane is involved in the protection of the embryo and plays a crucial role in the formation of the placenta. It is composed of two layers: the outer trophoblast and the inner extra-embryonic mesoderm.
- **Allantois**: This is a sac-like structure that arises from the gut of the embryo. In humans, it is relatively small and non-functional, but it is involved in the formation of blood cells and contributes to the umbilical cord.

5. **Conclusion**:
- Therefore, organisms with an amnion (like mammals and birds) also possess other fetal membranes, specifically the chorion and allantois, which serve important functions in the development of the embryo.

**Final Answer**: The organisms with amnion also possess other fetal membranes such as chorion and allantois.

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