Question

why is diffusion insufficient to meet the oxygen requirements of multicellular organisms like human​

Answer 1

Answer:

1.All cells in our body are not in the direct contact of air.

2.Even if they were in contact the diffusion pressure alone will not be sufficient to transport the the oxygen to the whole body in time.

That's why it is insufficient to meet the oxygen requirements.

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Explanation:

Answer 2

ᴅɪғғᴜsɪᴏɴ ɪs ɪɴsᴜғғɪᴄɪᴇɴᴛ ᴛᴏ ᴍᴇᴇᴛ ᴛʜᴇ ᴏxʏɢᴇɴ ʀᴇϙᴜɪʀᴇᴍᴇɴᴛ ᴏғ ᴍᴜʟᴛɪᴄᴇʟʟᴜʟᴀʀ ᴏʀɢᴀɴɪsᴍs ʟɪᴋᴇ ʜᴜᴍᴀɴ ʙᴇᴄᴀᴜsᴇ ᴀʟʟ ᴛʜᴇ ᴄᴇʟʟs ᴀʀᴇ ɴᴏᴛ ᴅɪʀᴇᴄᴛ ᴄᴏɴᴛᴀᴄᴛ ɪɴ ᴇɴᴠɪʀᴏɴᴍᴇɴᴛ ᴀɴᴅ ᴅɪғғᴜsɪᴏɴ ɪs ᴀ sʟᴏᴡ ᴘʀᴏᴄᴇss. ᴅɪғғᴜsɪᴏɴ ɪs ᴛᴏᴏ sʟᴏᴡ ᴛᴏ ᴄᴏᴠᴇʀ ᴛʜᴇ ᴅɪsᴛᴀɴᴄᴇ ʙᴇᴛᴡᴇᴇɴ ᴛʜᴇ ɢᴀs ᴇxᴄʜᴀɴɢᴇ sᴜʀғᴀᴄᴇ ᴀɴᴅ ᴛʜᴇ sɪᴛᴇs ᴡʜᴇʀᴇ ᴛʜᴇ ᴏxʏɢᴇɴ ɪs ʀᴇϙᴜɪʀᴇᴅ.