Where is the pyramid in the kidney? What is it..Can you please tell me if there is a very clear diagram?

When the human kidney is bivalved (cut in half
lengthwise), it can be seen to have an outer cortex measuring just over 1 cm. in
thickness.  The remaining inner portion of the kidney is the medulla.  The majority of
the medulla is composed of several pyramids, numbering from 7 to 18, and usually 7 in
each kidney.  The pyramids are oriented with their base to the cortex and the apex
pointing down into the kidney’s collection system, the renal pelvis (the medical
adjective referring to kidney is “renal”).

The reference
shows a sectioned kidney with these structures clearly illustrated and
labeled.

The renal cortex primarily contains the
Glomeruli.  These are thousands of tiny vascular structures where waste products are
extracted from the blood.  Each glomerulus sits in a Bowman’s capsule that collects the
waste and transports it into the renal tubules. The pyramids are composed mainly of
renal tubules where urine is formed and transported.  Urine leaves the pyramids through
the papillae, entering the renal pelvis.  Urine from the pelvis passes down the ureters
to the urinary bladder.