How many antennae do snails have?
Snail’s two sets of “antennae” are actually tentacles. The upper tentacles, or eye stalks, hold the snail’s eyes. The lower pair serves as olfactory (smelling) organs.
What are the antenna on slugs called?
Slugs eat using a radula, a rasping, tongue-like organ, covered with thousands of tiny tooth-like protrusions called denticles.
Where are eyes on a snail?
Snails have eyes on the tips of their tentacles. In the case of the Pulmonates [lung breathers] who have two pairs of tentacles, the eyes sit at the tip of the top pair.
Can a snail become a slug?
Slugs evolved from snails by reducing the size of the shell and internalizing it (yes, most slugs have an internal shell), and there are likely to be consequences of reducing the shell. A snail with an external shell large enough for the body to pull back into.
Do snails have a brain?
The cerebral ganglia of the snail form a primitive brain which is divided into four sections. This structure is very much simpler than the brains of mammals, reptiles and birds, but nonetheless, snails are capable of associative learning.
Is a slug a snail without a shell?
The simplest description is that slugs are snails without shells. Some of these mollusks do, in fact, have a shell, but those that do have internalized the shell and use it to store minerals.
Do slugs have hearts?
The slug’s trunk ends in a mucus pore, which is usually clogged with mucus. Inside the trunk under the portion covered by the left side of the mantle is its heart. The heart has just two chambers (we have four!) This means slugs possess both male and female organs.
Can snails see you?
Blind Snails Some snails have no eyes or are otherwise incapable of seeing. Certain species of underground snails never develop eyes and instead use their tentacles to find their way around, while others actually develop eyes that never see.
How many eyes have snails?
Some land species of snail, like the grapevine snail in the picture, have only 1 pair of tentacles, meaning they have only 1 eye. A snail has something called a radula in its mouth. It is like a file with rows made up of about 25,000 tiny teeth.
What do the antennae of a snail do?
The snail’s two sets of “antennae” are actually tentacles. The upper tentacles, or eye stalks, hold the snail’s eyes. The lower pair serve as olfactory (smelling) organs. Maybe you have seen an antenna for a remote control car or a television. The antenna can be pulled out to be long, but then pushed together and become short again.
What kind of tentacles do land snails have?
Land snails have two sets of tentacles that stick out, the longer set of tentacles are the ones that have the snail’s eyes. This way they can move their tentacles around to get the best view.
What kind of eyes does a land snail have?
Snails don’t rely on sight as much as humans, but it’s still one of their senses. Land snails have two pairs of tentacles. The snail can move these tentacles, which stick out from the top of the snail’s head, to get a better idea of its surroundings. The two tallest tentacles have eyes at their tips.
How does a slug move like a snail?
The slug is a gastropod, which translates to “stomach-foot.” A slug or snail moves by rhythmic waves of muscular contraction on the underside of its foot. At the same time a layer of mucus is secreted, which helps smooth the slug’s path across the ground. Slugs and snails have two pairs of retractable tentacles on their head.