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Why do the renal papillae appear striped?
The broad base of each pyramid faces the renal cortex, and its apex, or papilla, points internally towards the pelvis. The pyramids appear striped because they are formed by straight parallel segments of nephrons’ Loops of Henle and collecting ducts.
What makes up the renal pyramid?
The pyramids consist mainly of tubules that transport urine from the cortical, or outer, part of the kidney, where urine is produced, to the calyces, or cup-shaped cavities in which urine collects before it passes through the ureter to the bladder. The point of each pyramid, called the papilla, projects into a calyx.
What are the triangular regions of the kidneys that are striped in appearance and separated by the renal columns?
The Urinary System (Study Guide)
| A | B |
|---|---|
| renal pyramids | triangular regions with a striped appearance |
| renal columns | cortex-like tissue that separates each pyramid |
| renal pelvis | basin-like cavity deep to the hilum |
| calyces | cup-shaped areas that enclose the tips of the pyramids |
Why is the cortex and medulla different Colours?
Cortex and medulla It is darker than its underlying renal medulla because it receives over 90% of the kidney blood supply.
How do renal pyramids affect coloration of the medulla?
Each medulla is composed of structures called renal pyramids. Renal pyramids consist of blood vessels and elongated portions of tube-like structures that collect filtrate. The medulla regions appear darker in color than the outer surrounding area called the renal cortex.
Which of the following give the medullary pyramids the appearance of striations?
Kidney Medulla The pyramids appear striated, due to the parallel alignment of the loops of Henle and collecting tubules (Medulla 1).
What is the tube connecting the renal hilum of the kidney to the bladder?
The ureter connects the kidney and the urinary bladder.
Why medulla has a striped appearance?
The medulla consists of a number of medullary pyramids, named because of their triangular shape. These are striped in appearance because they contain microscopic coiled tubes called nephrons, the functional unit of the kidney . From the calyces the urine drains into the wider open space of the renal pelvis.