When it is in the hollow cell, the hollow cell takes the food and propels it into little tubes, which are lined with flame cells. These flame cells contain small cilia, these cilia pushes the waste from the flame cells to tubules that excrete the waste from the proglottids.
Attachment size limit. You can send up to 25 MB in attachments. If you have more than one attachment, they can't add up to more than 25 MB. If your file is greater than 25 MB, Gmail automatically adds a Google Drive link in the email instead of including it as an attachment. The person you send the file to can download it so they'll have access to it even if you remove it from Google Drive.
The Office 365 server has the maximum send and receive message size (and optional attachment) set at 25 MB. Keep in mind that someone's mailbox on the Office 365 server will be prohibited from receiving messages if they exceed the maximum quota limit. The default maximum quota for receiving is 25 GB.