Tentacles Like other terrestrial abalone, most terrestrial slugs have two pairs of "tentacles" or tentacles on their heads. The upper pair is light-sensing, with eye-spots on both ends, and the lower pair provides a sensation of odor. Both pairs are retractable.
What is the antenna of a slug?
The upper tentacles are called optical tentacles and are the eyes of slugs. Optical tentacles have light-sensitive eye-spots on the edges that can be regrown if lost. These are also used for odors. The lower pair are two small tentacles, used for sensation and tasting.
Why is there a hole in the head of a slug?
A pneumostorm or breathing hole is a breathing opening in the extracorporeal structure of an air-breathing terrestrial slug or terrestrial snail. It is part of the abalone respiratory system. .. In fully hydrated slugs and snails, the frequency of opening and closing the abalone is usually less than 0.5 times per minute.
Do slugs have three hearts?
Most species have two chambers. The atrium that receives blood lymph from the gills or lungs and the ventricle that feeds it into the aorta. However, some primitive abdominal feet have two gills, each supplying its own pinna, so the heart has three chambers.
Do slugs have horns?
Both slugs and snails have two small horn-like protrusions on their heads. The difference is that there is a stiff spiral shell used to protect the snail's back. They breed by placing small gelatinous egg clusters in the soil.
Below you will find two helpful answers on a similar topic. 👇
How many nose does snail have?Can slugs see me?
