Question

why flatworms are called acoelomates?

Answer 1

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ᴀᴄᴏᴇʟᴏᴍᴀᴛᴇs- ᴘʟᴀᴛʏʜᴇʟᴍɪɴᴛʜᴇs.


ᴛʜɪs ᴘʜʏʟᴜᴍ ᴅᴇʀɪᴠᴇs ɪᴛs ɴᴀᴍᴇ ғʀᴏᴍ ᴛʜᴇ ғᴀᴄᴛ ᴛʜᴀᴛ ᴍᴀɴʏ ᴍᴇᴍʙᴇʀs ᴏғ ᴛʜᴇ ɢʀᴏᴜᴘ ᴀʀᴇ ᴅᴏʀsᴏᴠᴇɴᴛʀᴀʟʟʏ (ᴛʜᴀᴛ ɪs, ғʀᴏᴍ ᴛᴏᴘ ᴛᴏ ʙᴏᴛᴛᴏᴍ) ғʟᴀᴛᴛᴇɴᴇᴅ.


ғʟᴀᴛᴡᴏʀᴍs ᴀʀᴇ ʙɪʟᴀᴛᴇʀᴀʟʟʏ sʏᴍᴍᴇᴛʀɪᴄᴀʟ ᴏʀɢᴀɴɪsᴍs, ᴡɪᴛʜ ᴛʜʀᴇᴇ ɢᴇʀᴍ ʟᴀʏᴇʀs (ᴇᴄᴛᴏᴅᴇʀᴍ, ᴇɴᴅᴏᴅᴇʀᴍ, ᴀɴᴅ ᴍᴇsᴏᴅᴇʀᴍ) ʙᴜᴛ ʟᴀᴄᴋ ᴀ ʙᴏᴅʏ ᴄᴀᴠɪᴛʏ ᴏʀ ᴄᴏᴇʟᴏᴍ.



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Answer 2

Flatworms are bilaterally symmetrical organisms, with 3 germ layers( ectoderm mesoderm, endoderm) but lack a body cavity or coelom that's why they are called as Acoelomates.