A renal corpuscle in the kidney consists of two structures:
Glomerulus - a tangled cluster of blood capillaries.
Bowman's capsule - a thin walled, saclike structure that surrounds a glomerulus.
Fluid filtered from blood flowing through a glomerulus is collected within Bowman's capsule.
Bowman's capsule as seen by scanning electron microscopy (SEM). The freeze fractue split this renal corpuscle removing the glomerulus. The interior of Bowman's capsule is lined with a simple squamous epithelium. The cell borders are not visible and the surface of cells bulge into the capsule over the nuclei.
Simple Squamous Epithelium (blue)
Collecting Tubules (yellow)
The exit into a collecting tubule is the dark hole at the bottom of the capsule.