solium, no hooks are present on the scolex of T. saginata. The scolex has a maximum diameter of 1.5 to 2 mm while each sucker is approximately 0.7 to 0.8 mm in diameter. The worms have been observed to attain a length upwards of 25 meters, though are usually closer to 5 meters in length.

How big is a tapeworm scolex?

The anterior end is a knob-like attachment organ (sometimes mistakenly-referred to as a "head") called a scolex, 1 mm in diameter. The scolex bears four radially arranged suckers that surround the rostellum. These are the organs of adhesive attachment to the intestinal wall of the host.

What is the average size of a tapeworm?

Tapeworms are flat, segmented parasites that can grow from 4 to 28 inches (10 to 71 centimeters) in length. Typically, they attach themselves to a host's intestinal walls and feed off the host's food.