Which part of the endothelial-capsular membrane prevents red blood cells from entering the capsular space?

Explanation

To answer the question regarding which part of the endothelial-capsular membrane prevents red blood cells from entering the capsular space, we can break down the solution into the following steps:

### Step-by-Step Solution:

1. **Understanding the Structure**: The endothelial-capsular membrane is a part of the kidney's filtration system, specifically in the glomerulus. It consists of endothelial cells, a basement membrane, and podocytes.

2. **Identifying Key Components**: The endothelial cells of the glomerulus have specialized structures called fenestrations (or pores). These fenestrations play a crucial role in filtration.

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