Identify the odd one from the following.
- Labia minora
- Fimbriae
- Infundibulum
- Isthmus
The Correct Option is A
Approach Solution - 1
The correct answer is:
Option 1: Labia minora
Explanation:
The labia minora is a part of the female external genitalia, whereas the other three options—fimbriae, infundibulum, and isthmus—are all structures related to the female reproductive tract specifically associated with the fallopian tubes.
Fimbriae (Option 2) are finger-like projections at the end of the fallopian tube that help capture the egg.
Infundibulum (Option 3) is the funnel-shaped part of the fallopian tube that is adjacent to the ovary and has fimbriae.
Isthmus (Option 4) is the narrow part of the fallopian tube that connects to the uterus.
In contrast, labia minora is located outside the body and is part of the external genitalia, not the internal reproductive organs.
Thus, the labia minora is the odd one out.
Approach Solution -2
To identify the odd one out, let's consider the anatomical context of each term:
- Isthmus: In the context of the female reproductive system, the isthmus is the narrow section of the fallopian tube that connects to the uterus.
- Fimbriae: These are finger-like projections at the distal end of the fallopian tube, near the ovary. They help to capture the ovulated egg.
- Labia minora: These are the inner folds of skin surrounding the vaginal opening, part of the external female genitalia (vulva).
- Infundibulum: This is the funnel-shaped opening of the fallopian tube near the ovary. The fimbriae are located on the infundibulum.
The isthmus, fimbriae, and infundibulum are all parts of the fallopian tube. The labia minora is part of the external genitalia. Thus, Labia minora is not part of the fallopian tube.
Therefore, the odd one out is Labia minora.
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Concepts Used:
Human Reproduction
Reproduction in human beings involves the fusion of male and female gametes that produces in their reproductive system.
Male Reproductive System:
The male reproductive system comprises:
- Testicles (testes): A pair of oval-shaped organs masked in a pouch known as the scrotum. They manage the production of sperms and the male hormone testosterone.
- Scrotum: It is a sac-like organ that hangs under the penis and behind it. It is the house of the testes, or testicles, and maintains a temperature that is needed for the production of sperm by it.
- Vas deferens: The sperms produced in testes are stored in a tube known as the epididymis. Here the sperms get matured and pass to the urethra via the muscular tube known as vas deferens.
- Accessory glands: This includes three glands, namely the prostate gland, seminal vesicles, and Cowper’s gland. The secretions from the mentioned three glands mix to form a fluid known as semen. Semen nourishes the sperm, raises the volume, and helps in lubrication.
- Penis: The penis is a cylindrical tube that serves as both an excretory organ, and a reproductive organ. It transfers sperms into the vagina during sexual intercourse.
Female Reproductive System:
The female reproductive system is active before, during, and after fertilization as well. It comprises the following parts:
- A pair of ovaries: A pair of ovaries produce and stores ovum in them. They also produce a female hormone known to be estrogen.
- Fallopian tubes (Oviducts): They are the area of fertilization. They connect both the ovaries with the uterus.
- Uterus: Uterus is the place of development for the embryo.
- Vagina: The part that connects the cervix to the external female body parts is called a vagina. It is the passage for the penis during coitus as well as a fetus during transfer.