Question

______ has a bean seed like shape

• A. Kidney
• B. Urinary bladder
• C. Heart
• D. Lungs

Hint:

Remember: "Reniform" means kidney-shaped or bean-shaped. The kidney's concave medial border and convex lateral surface give it this distinctive bean-like appearance.

Answer 1

The Correct Option is A

Step 1: Understanding the shape of a bean seed.
A bean seed typically has an oval or elliptical shape with a concave indentation on one side (the hilum). This distinctive shape is often described as "reniform" (kidney-shaped).
Step 2: Analyzing the shape of each organ.

Kidney: The human kidney is bean-shaped (reniform) with a concave medial border and convex lateral surface. This shape is almost identical to that of a bean seed.
Urinary bladder: The urinary bladder is a hollow, muscular organ that is roughly spherical or pear-shaped when full and flattened when empty. It does not resemble a bean seed.
Heart: The heart is roughly cone-shaped or pyramid-shaped with a broad base and tapered apex. It does not have a bean-like shape.
Lungs: The lungs are roughly cone-shaped organs with a broad base and apex. They are not bean-shaped.
Step 3: Etymology and terminology.
The term "reniform" (from Latin ren = kidney) is used in biology to describe structures that are kidney-shaped or bean-shaped. This directly links the kidney to the bean seed shape.
Step 4: Conclusion.
Among the given options, the kidney is the organ that most closely resembles a bean seed in shape, with its characteristic reniform appearance.
Final Answer: (A) Kidney.