Difficulty: Easy
Correct Answer: Fimbriae
Explanation:
Introduction / Context:
The fallopian tubes (also called uterine tubes or oviducts) play a key role in transporting the ovulated egg from the ovary toward the uterus and are the usual site of fertilization. Their distal ends near the ovaries have special structures that increase the chances of picking up the oocyte when it is released. This question asks for the correct term used to describe these finger like projections.
Given Data / Assumptions:
Concept / Approach:
The funnel shaped, open end of each fallopian tube near the ovary is called the infundibulum. The margin of the infundibulum bears multiple finger like projections called fimbriae. During ovulation, the fimbriae sweep over the surface of the ovary and help guide the released oocyte into the opening of the tube. Cysts are abnormal fluid filled sacs, papillae are small nipple like projections in various tissues, labia are external folds of skin at the vulva, and villi are microscopic finger like projections in organs like the small intestine and placenta. Only fimbriae correctly describe the visible finger like projections on the fallopian tubes.
Step-by-Step Solution:
Step 1: Recall that the ovary releases an egg into the pelvic cavity during ovulation.
Step 2: Remember that the infundibulum of the fallopian tube lies close to the ovary and is fringed by finger like projections.
Step 3: Identify these projections as fimbriae, which help sweep the egg into the tube.
Step 4: Recognise that cysts are pathological structures and do not describe normal anatomy of the tube.
Step 5: Note that papillae and villi refer to different types of projections in other organs, and labia refer to external folds of skin.
Step 6: Conclude that the finger like ends of the fallopian tubes are properly called fimbriae.
Verification / Alternative check:
Anatomy atlases and gynaecology texts label the outer end of the uterine tube near the ovary as the infundibulum, with fimbriae arising from its margin. Illustrations often show one larger fimbria called the ovarian fimbria that attaches to the ovary. These sources consistently use the term fimbriae for the finger like projections, supporting this answer over the other terms listed.
Why Other Options Are Wrong:
Cysts: Abnormal fluid filled sacs that may occur in ovaries or other organs; not normal anatomic projections.
Papillae: Small nipple like projections found in structures such as the tongue or kidney, not specifically at the ends of fallopian tubes.
Labia: External skin folds (labia majora and labia minora) at the vulva, far from the ends of the fallopian tubes.
Villi: Microscopic finger like projections that increase surface area in intestines and the placenta; not the large visible projections of the uterine tubes.
Common Pitfalls:
Students may confuse anatomical terms for different types of projections or think villi is a general word for all finger like structures. It is important to associate fimbriae specifically with the fallopian tube ends, villi with microscopic absorption surfaces, and labia with external genital folds. Clear mental images of these structures help in avoiding such mix ups.
Final Answer:
The finger like ends of the fallopian tubes are called fimbriae.
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