EVERYDAY SCIENCE

Detailed explanation-1: -The phylum Platyhelminthes, the flatworms, shows bilateral symmetry. In bilateral symmetry, you create two matching halves by drawing a line from the anterior (head) end of the organism to the posterior (tail) end. This creates two sides that seemingly reflect each other.

Detailed explanation-2: -Flatworms are bilaterally symmetrical with a defined head and tail region and a centralized nervous system containing a brain and nerve cords. Clusters of light-sensitive cells make up eyespots on either side of the head.

Detailed explanation-3: -Flatworms and nearly all other animals from here on are bilaterally symmetrical (right and left halves are mirror images). The front end of such animals usually forms a distinct head.

Detailed explanation-4: -Flatworms’ bodies are bilaterally symmetrical and they have a defined head and tail region. They have a central nervous system containing a brain and a nerve cord. Clusters of light-sensitive cells on either side of their head make up what are called eyespots.

Detailed explanation-5: -Bilateral symmetry involves the division of the animal through a sagittal plane, resulting in two mirror-image, right and left halves, such as those of a butterfly, crab, or human body. Animals with bilateral symmetry have a “head” and “tail” (anterior vs. posterior), front and back (dorsal vs.