When in plant leaves, chloroplast containing bundle sheath cells surrounds vascular bundles in several layers that anatomy is known as

Answer

**Step-by-Step Solution:**

1. **Understanding the Structure**: In certain plants, particularly C4 plants, the anatomy of the leaves is specialized. The chloroplast-containing bundle sheath cells are arranged in a way that they surround the vascular bundles.

2. **Identifying the Cells**: The bundle sheath cells are characterized by having thick walls and contain large O-granule chloroplasts. These cells play a crucial role in the photosynthetic process.

3. **Function of Bundle Sheath Cells**: The bundle sheath cells are responsible for fixing carbon dioxide into sugars using the enzyme Rubisco. This is a key step in the process of photosynthesis.

4. **Role of Mesophyll Cells**: In addition to the bundle sheath cells, the thin-walled mesophyll cells contain grana in their chloroplasts. These cells are involved in the initial fixation of carbon dioxide, utilizing the enzyme PEP carboxylase.

5. **Defining the Anatomy**: The specific arrangement of chloroplast-containing bundle sheath cells surrounding the vascular bundles in C4 plants is referred to as "transanatomy."

6. **Conclusion**: Therefore, the anatomy where chloroplast-containing bundle sheath cells surround vascular bundles in several layers is known as transanatomy.

**Final Answer**: Transanatomy

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