Multiple choice

Platyhelminthes are __________.

  1. coelomates

  2. acoelomates

  3. pseudocoelomates

  4. haemocoelomates
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Platyhelminthes (flatworms) are acoelomates, meaning they lack a body cavity entirely. They have solid bodies with mesenchyme filling the space between the gut and body wall. Coelomates have a true body cavity lined by mesoderm, while pseudocoelomates have a body cavity partially lined by mesoderm. Flatworms are the simplest bilaterally symmetrical animals and triploblastic, but they lack any type of body cavity.

Keep practicing — related questions