The snail is a terrestrial taxon of the mollusk phylum gastropod, which belongs to the group of invertebrates. The body is soft and usually protected by a spiral hard shell. The head has two pairs of antennae, the longer one for sensing the environment and the shorter one associated with smell and taste. The foot is muscular and moves slowly on various surfaces by secreting mucus. The shell is one of its distinctive features. The shape and color of the shell vary from type to type. It is not only a protective device for snails, but also helps them retain moisture and adapt to a dry environment. It is an omnivorous animal that feeds on the leaves, stems and fruits of plants, and some species also eat humus or small insects.

The snail is a terrestrial taxon of the mollusk phylum gastropod, which belongs to the group of invertebrates. The body is soft and usually protected by a spiral hard shell. The head has two pairs of antennae, the longer one for sensing the environment and the shorter one associated with smell and taste. The foot is muscular and moves slowly on various surfaces by secreting mucus. The shell is one of its distinctive features. The shape and color of the shell vary from type to type. It is not only a protective device for snails, but also helps them retain moisture and adapt to a dry environment. It is an omnivorous animal that feeds on the leaves, stems and fruits of plants, and some species also eat humus or small insects.

The snail is a general term for the terrestrial taxa of the mollusk phylum gastropod, which belongs to invertebrates. The body is soft and usually protected by a spiral hard shell. The head has two pairs of antennae, the longer one for sensing the environment and the shorter one associated with smell and taste. The foot is muscular and moves slowly on various surfaces by secreting mucus. The shell is one of its distinctive features. The shape and color of the shell vary from type to type, from simple conical to complex spiral. It is a protective device for snails, and it can also help them retain moisture and adapt to dry environments. It's an omnivorous animal. It is often used for scientific research, ecological education or as a food.

Amoeba is a unicellular animal belonging to the genus Amoeba in the family Proteaceae of the order Proteobacteria. There is only a thin plasma membrane on the surface of the body, and the cytoplasm inside the membrane is relatively transparent, which can be clearly distinguished into two parts: endoplasmic and extracellular; Pseudo feet are shaped like fingers, leaves, or needles; Insects can undergo special deformation movements through pseudopodia, which change with the expansion and contraction of pseudopodia; Pseudo foot not only has the function of movement, but also has the function of feeding. After wrapping food, it undergoes intracellular digestion. Named after the constant changes in body shape caused by the movement of the parasite's cytoplasm.