Q.143 Zoology ⭐ 360° Option Elimination Active

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NEET 2026 Zoology Question 143 Solution

Topic: Human Reproduction · Official NTA Booklet Code 50

Question

Which of the following structure is not a part of the male reproductive system?

(1)Rete testis
(2)Epididymis
(3)Vasa efferentia
(4)Infundibulum

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Verified Against NTA Final Answer Key

Option (4) : Infundibulum

📚 Human Reproduction Easy

📋 Given Parameters & Problem Setup

Evaluation Goal Identify structure that is NOT a part of the male reproductive system

Candidate Anatomical Structures Rete testis, Epididymis, Vasa efferentia, Infundibulum

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The 30-Second Exam Hall Shortcut: ⚡ Female Fallopian Duct Spotter

⏱️ Save ~40 seconds

Infundibulum is the funnel-shaped entrance to the Fallopian Tube (Female)!

1 Recall male accessory ducts in sequence: Seminiferous tubules -> Rete testis -> Vasa efferentia -> Epididymis -> Vas deferens.

2 Options (1), (2), and (3) are all male accessory reproductive ducts.

3 Infundibulum is the funnel-shaped part of the female oviduct closest to the ovary (bearing fimbriae).

4 Therefore, Infundibulum is NOT part of the male system.

5 Select Option (4) in under 5 seconds!

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Why You Can 100% Trust This Shortcut: NCERT Biology · Human Reproduction (Male Reproductive System: Leydig cells produce androgens under LH stimulation).

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Step-by-Step Rigorous Workflow & Mathematical Proof

Step 1

Anatomy of the Male Reproductive Duct System

The male sex accessory ducts include the rete testis, vasa efferentia, epididymis, and vas deferens. Sperm generated in seminiferous tubules pass sequentially through these ducts to mature and undergo transport.

\text{Male Ducts} = \text{Seminiferous Tubules} \rightarrow \mathbf{Rete\text{ Testis}} \rightarrow \mathbf{Vasa\text{ Efferentia}} \rightarrow \mathbf{Epididymis} \rightarrow \text{Vas Deferens}

• Options (1), (2), and (3) belong to the male reproductive system.

Step 2

Anatomy of the Female Oviduct (Fallopian Tube)

Each Fallopian tube is 10–12 cm long and consists of three distinct segments: (1) Infundibulum (the funnel-shaped opening closest to the ovary, featuring finger-like fimbriae that collect the ovum after ovulation), (2) Ampulla (the wider middle region where fertilization occurs), and (3) Isthmus (the narrow terminal lumen joining the uterus).

\text{Oviduct (Female)} = \mathbf{Infundibulum\text{ (with fimbriae)}} \rightarrow \text{Ampulla} \rightarrow \text{Isthmus}

• Infundibulum is exclusively a female reproductive structure.

Step 3

Conclusion

Infundibulum is part of the female reproductive system, and therefore not part of the male reproductive system.

\text{Not male structure} = \mathbf{Infundibulum} \implies \text{Option (4)}

• Matches official NTA final answer key Option D / (4).

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360° Option Elimination Engine Key Feature

Diagnose every choice: Know exactly why the right option works and why distractors fail.

4-Option Deep Scan

1 A

✗ Incorrect

Verdict & Scientific Reason:

Incorrect. Rete testis is an essential male duct network located inside the mediastinum testis.

⚠️

Student Fallacy (Why candidates pick this trap): Failing to read the negative condition in the stem.

2 B

✗ Incorrect

Verdict & Scientific Reason:

Incorrect. Epididymis is the coiled male duct where spermatozoa undergo functional maturation and storage.

⚠️

Student Fallacy (Why candidates pick this trap): Misclassifying a prominent male organ.

3 C

✗ Incorrect

Verdict & Scientific Reason:

Incorrect. Vasa efferentia conduct sperm from rete testis to epididymis in the male system.

⚠️

Student Fallacy (Why candidates pick this trap): Confusing male vasa efferentia with female structures.

4 D

✓ 100% Correct

Verdict & Scientific Reason:

100% accurate. Infundibulum is the proximal funnel-shaped portion of the female Fallopian tube.

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Why this is airtight: None; sharp anatomical distinction.

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NTA Trap Alert: Duct Nomenclature Precision

Male ducts: Vasa efferentia, Vas deferens, Epididymis, Rete testis. Female ducts: Infundibulum, Ampulla, Isthmus, Uterus, Vagina.

🛡️ How to avoid the -1 mark: Associate Infundibulum with Fimbriae: both are female funnel parts collecting eggs!

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Core NEET Syllabus Standard

NEET Biology Core Syllabus · Human Reproduction Standard Benchmark

Core Scientific Principle Tested:

"The male accessory ducts are rete testis, vasa efferentia, epididymis, and vas deferens. Infundibulum is a component of the female Fallopian tube."

Syllabus Focus: Male and Female Reproductive Systems

✓ Core NEET UG Syllabus Anchor Syllabus & Academic Standards ↗

Rete, Vasa, Epididymis are for the Guy; Infundibulum and Fimbriae catch Eggs floating by!

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NEET 2026 Zoology Question 143 Solution

Question

The 30-Second Exam Hall Shortcut: ⚡ Female Fallopian Duct Spotter

Step-by-Step Rigorous Workflow & Mathematical Proof

Anatomy of the Male Reproductive Duct System

Anatomy of the Female Oviduct (Fallopian Tube)

Conclusion

360° Option Elimination Engine Key Feature

NTA Trap Alert: Duct Nomenclature Precision

Core NEET Syllabus Standard

Ready to attempt under real exam pressure?

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Structure and Function of Human Spermatozoon

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