• Taenia is commonly known as tapeworm.

• Body consists of scolex or head, neck and strobila or body segments.

• Scolex is smaller than the head of a pin, about I mm in diameter. It is the organ of attachment, bears four suckers and a rostellum which has a double circlet of hooks about 28 to 32 in number.

• Behind the scolex is a thin unsegmented neck.

• Strobila or body consists of large number of segments about 800 or more in number. Each segment is termed a proglottid.