Urine is formed by a specific structure known as the _(1). To begin this process, blood enters the renal corpuscle by way of the afferent arteriole and reaches the _(2)_
of the nephron, which is a specialized capillary bed that acts like a strainer to filter out
dissolved particles from the plasma.
As fluid leaves the glomerulus, it enters _(3)_ and is now known as filtrate.
Filtrate quickly moves into the next segment of the nephron, the renal tubule by entering
the _(4)_, where 65% of all particles the body needs to keep are reabsorbed into
peritubular capillaries.
Next, the filtrate moves to the _(5)_, where reabsorption is completed. In the
_(6), water only is reabsorbed into the vasa recta while in the _(7)_, salt only is actively
transported into the medullary space. The last stop for the filtrate is the _(8), where
secretion occurs. Here waste products can be secreted from the peritubular capillaries
and become a component of urine.
The last stop in the nephron is the _(9)_, where urine from multiple nephrons
merges together. This tube carries the urine to the inferior part of the pyramid known as
the _(10)_, where urine drips into a funnel shaped structure known as a _(11)
Each calyx collects urine from one pyramid and transports the waste into the
center of the kidney in an open area known as the _(12)_. This region directs urine out
of the kidney via the _(13), which exits the hilum. From here, the ureters carry urine for
storage in the _(14)_before it will be released from the body by a final output tube
known as the _(15)