ER, Golgibody, Iysosome and vacuole is included in endomembrane system becaue their function are coordinated.

Answer

**Step-by-Step Solution:**

1. **Understanding the Endomembrane System**:
The endomembrane system is a collection of membranes and organelles within a cell that work together to perform specific functions. This includes structures like the endoplasmic reticulum (ER), Golgi apparatus, lysosomes, and vacuoles.

2. **Functions of Each Organelle**:
- **Endoplasmic Reticulum (ER)**: The primary function of the ER is protein synthesis. It is involved in the production and processing of proteins.
- **Golgi Body**: The Golgi apparatus is responsible for modifying, packaging, and sorting proteins that have been synthesized in the ER.
- **Lysosomes**: These organelles contain enzymes that break down waste materials and cellular debris. They are involved in the digestion of unwanted materials.
- **Vacuoles**: Vacuoles serve as storage compartments for unwanted or waste materials in the cell.

3. **Coordinated Functions**:
The functions of the ER, Golgi body, lysosomes, and vacuoles are interdependent. The ER synthesizes proteins, which are then sent to the Golgi body for packaging. The Golgi body can send proteins to lysosomes for digestion or to vacuoles for storage. This coordination of functions indicates that these organelles work together as part of the endomembrane system.

4. **Conclusion**:
Since the functions of the ER, Golgi body, lysosomes, and vacuoles are coordinated and interdependent, the statement that they are included in the endomembrane system is true.

**Final Answer**: True

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