Glomerular blood hydrostatic pressure mmHg , promotes filtration.
Capsular hydrostatic pressure , opposes filtration.
Blood colloid osmotic pressure , opposes filtration.

Net filtration pressure (NFP), total pressure that promotes filtration, is calculated by subtracting the pressures that oppose filtration from the GBHP.

Thus, a pressure of only 10 mmHg causes a normal amount of blood plasma (minus plasma proteins) to filter from the glomerulus into the capsular space.

──────────────────────────────────────────────────────────────────────────────────────────