Figure 212. Renal corpuscle.
c. Tubule. Bowman's capsule is drained by the renal tubule. The first part of
this tubule runs quite a distance in a coiled position and is called the proximal
convoluted tubule. This portion eventually straightens and descends toward the
medulla, but turns back again at a very sharp bend known as the loop of Henle. As the
tubule ascends, it once again forms a coiled segment that is called the distal convoluted
tubule. The distal convoluted tubules drain into a system of wide tubes called the
collecting tubules. The renal corpuscles lie in the cortex, while Henle's loop and the
collecting tubules lie in the medulla.
223. FLUID DYNAMICS
a. Volume of Blood Flow. Far more blood (25 percent of total cardiac output
per minute) flows into the kidneys than is necessary for the provision of oxygen and
nutrients to the kidney. In the kidney, the blood supplies not only the oxygen and
nutrients but also a portion of blood is filtered by the kidney for processing. When
severe stress is placed on the body due to hemorrhage, the blood flow to the kidneys is
reduced, and very little urine is formed. The flow of blood is proportional to the quotient