Difficulty: Easy
Correct Answer: Shrimps
Explanation:
Introduction / Context:
Different animal groups have very different body plans. In vertebrates like humans, the heart is located in the chest, but in many invertebrates the heart can be found in other body regions. This question asks you to identify the creature that has its heart located in the head region, a well known fact in animal general knowledge quizzes.
Given Data / Assumptions:
Concept / Approach:
Shrimps are crustaceans with segmented bodies divided into regions such as the cephalothorax and abdomen. In shrimps, the heart lies in the upper part of the body near the head region and is enclosed in a special sac. Because the head and thorax are fused in a cephalothorax, this region is functionally associated with the head. This feature has given rise to the popular statement that shrimps have their heart in their head. The other options have different circulatory arrangements that do not fit this description in standard general knowledge.
Step-by-Step Solution:
Step 1: Recall that shrimps and related crustaceans have a cephalothorax, where the head and thorax are fused into one region.
Step 2: The heart in shrimps lies in this cephalothoracic region, which is anatomically close to the head.
Step 3: Cockroaches have a long tubular heart running along the dorsal side of the thorax and abdomen.
Step 4: Snails and earthworms also have circulatory structures located mainly in the body, not specifically in the head region.
Step 5: Honey bees have a dorsal vessel along the body as well, so they do not match the popular statement about a heart in the head.
Verification / Alternative check:
A quick verification is to link the phrase heart in its head with shrimps, as many GK books and quiz programmes repeat this fact. If you visualize a shrimp, you see a large head like region covered by a hard shell where the main organs, including the heart and stomach, are located. The long tail portion is mostly muscle used for swimming. This mental picture supports the idea that the heart is located in the head region for shrimps, not for the other listed creatures.
Why Other Options Are Wrong:
Cockroaches have a series of heart chambers in the dorsal vessel extending through the thorax and abdomen, so the heart is not confined to the head. Snails have a simple heart located in the visceral mass inside the shell, closer to the body, not in the head region. Honey bees have a dorsal heart that runs along the body cavity, again not specifically in the head. Earthworms have a closed circulatory system with a main dorsal and ventral vessel and several pairs of pseudo hearts in the anterior body, not a single heart in the head.
Common Pitfalls:
Students may confuse shrimps with other arthropods such as insects or mix up cockroach facts with shrimp facts because both are often discussed together. Another pitfall is to interpret head region very strictly instead of understanding that the cephalothorax is effectively the head and chest combined. Remembering the simple quiz phrase that shrimps have their heart in their head will help you answer quickly and confidently in exams.
Final Answer:
The creature whose heart is located in the head region is the shrimp, so the correct option is shrimps.
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