1. Taenia belongs to the class Taenia of Platycladus. The back and abdomen of this kind of adults are flat, symmetrical left and right, mostly segmented and strip-shaped, without mouth, digestive tract and body cavity, and all of them are hermaphroditic except a few.
2. All tapeworms live parasitically, and most adults live in the digestive tract of vertebrates. There are 1 ~ 2 intermediate hosts in the life history, and the period of development in the intermediate hosts is called Yuanjie. The morphological structure and names of tapeworm larvae in various tapeworms are different. There are more than 30 species of tapeworms parasitic on human body, belonging to Cyclophylloidea and Ye Jia respectively. There are obvious differences between these two purposes in form and life history.
3. In their life history, some have only one host, and some need 1 or two intermediate hosts besides determining the host. Symmetry on both sides. Some consist of a long segment, while others have a segment followed by a row of segments of the same shape. There is a sucker and usually a hook on the head section, which is used to fix it on the main machine. Absorb food through the epidermis, without oral cavity and digestive tract. Most of them are hermaphroditic and usually self-fertilized. Life history is complicated.
4. Morphological characteristics: Taenia solium is actually an adsorption organ, also known as appendage, and its structure has sucker-shaped, groove-shaped and leaf-shaped. Generally, there is a snout at the top of the head section and some hooks. Some suction cups or blades also have small hooks on the surface to strengthen the fixation. The back end of the cephalic segment is a slender neck, and its function is to produce new segments. Tapeworms have no digestive organs, and rely entirely on the hairs on the body surface to absorb the nutrition of the host.