Table of contents

1. Introduction to Anatomy & Physiology5h 43m
2. Cell Chemistry & Cell Components12h 36m
3. Energy & Cell Processes10h 6m
4. Tissues & Histology10h 3m
5. Integumentary System2h 20m
6. Bones & Skeletal Tissue2h 16m
7. The Skeletal System2h 35m
8. Joints2h 17m
9. Muscle Tissue2h 33m
10. Muscles1h 11m
11. Nervous Tissue and Nervous System1h 35m
12. The Central Nervous System1h 6m
- Introduction to the Central Nervous System
  18m
- The Cerebrum
  48m
13. The Peripheral Nervous System1h 26m
14. The Autonomic Nervous System1h 38m
15. The Special Senses2h 41m
16. The Endocrine System2h 48m
17. The Blood3h 22m
18. The Heart3h 42m
19. The Blood Vessels3h 35m
20. The Lymphatic System3h 16m
21. The Immune System14h 37m
22. The Respiratory System3h 20m
23. The Digestive System2h 5m
24. Metabolism and Nutrition4h 0m
25. The Urinary System2h 39m
26. Fluid and Electrolyte Balance, Acid Base Balance37m
27. The Reproductive System2h 5m
28. Human Development1h 21m
29. Heredity3h 32m

25. The Urinary System

The Kidneys

Anatomy & Physiology

25. The Urinary System

The Kidneys

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2:23 minutes

Problem 11

Textbook Question

Using the image provided, identify and label the cortex, medulla, medullary pyramids, renal columns, and pelvis.

Verified step by step guidance

Step 1: Begin by identifying the outermost layer of the kidney in the image. This layer is called the cortex, which is responsible for filtration and contains structures like glomeruli and proximal/distal tubules. Label this region as 'Cortex'.

Step 2: Locate the inner region beneath the cortex. This area is known as the medulla, which contains the renal pyramids and is involved in concentrating urine. Label this region as 'Medulla'.

Step 3: Within the medulla, identify the triangular structures. These are the medullary pyramids, which contain collecting ducts that transport urine to the renal pelvis. Label these structures as 'Medullary Pyramids'.

Step 4: Look for the spaces between the medullary pyramids. These are the renal columns, which are extensions of the cortex and provide structural support. Label these areas as 'Renal Columns'.

Step 5: Finally, locate the central cavity-like structure where urine collects before moving to the ureter. This is the renal pelvis, which acts as a funnel for urine. Label this structure as 'Pelvis'.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Cortex

The cortex is the outer layer of an organ, in this case, the kidney. It contains the renal corpuscles and the renal tubules, playing a crucial role in filtering blood and forming urine. The cortex is essential for the kidney's overall function, as it is where the initial stages of urine formation occur.

Medulla

The medulla is the inner region of the kidney, situated beneath the cortex. It consists of renal pyramids, which are cone-shaped structures that contain the loops of Henle and collecting ducts. The medulla is vital for concentrating urine and regulating water balance in the body.

Renal Pelvis

The renal pelvis is a funnel-shaped structure that collects urine from the renal calyces and channels it into the ureter. It serves as a reservoir for urine before it is transported to the bladder. Understanding the renal pelvis is important for comprehending the kidney's role in urine excretion.