Web23. sep 2024. · Gills in 30-day- (left, center) and 50-day-old (right) Octopus vulgaris. Here we can see gills, the respiratory organs used by aquatic organisms to extract oxygen from water and expel carbon dioxide. Gills are located inside the mantle cavity of the octopus. Two of the three hearts in an octopus pump blood across the gills. Web27. feb 2024. · Researchers don’t know much about the flapjack octopus’s specific mating habits. But, their mating and reproductive habits likely resemble that of other octopuses. The male octopus will insert his hectocotylus into the female’s mantle cavity. The hectocotylus is a specialized arm that the male uses to deposit sperm.
Octopus Lifespan, Intelligence, Brains and Hearts - Jotscroll
Web16. apr 2024. · An octopus has one pair of large eyes. It breathes with gills which are located within a cavity in the mantle. Water reaches this cavity via a tube known as the siphon. If the octopus needs to make a quick getaway, it contracts its mantle and shoots water through the siphon. This acts like a jet engine, propelling the octopus through the … Web19. okt 2024. · 21. Star-sucker Pygmy Octopus (Octopus wolfi) Another one of the smallest octopuses scientists have found to date is the Star-sucker Pygmy octopus. They only weigh 0.5 (14.2 g) to 1 ounces (28.3 g) when they are full-grown and extend from 1 (2.54 cm) to 3 inches (7.6 cm) long. is east africa rifting
Mollusks and Annelids OpenStax: Concepts of Biology Course …
WebSquid and octopi use the mantle and mantle cavity as an escape mechanism. Molluscs feed by means of a peculiar rasping tongue called a radula, a tiny little chainsaw-like structure made of chitin. Chitin is basically a cellulose polymer with an added nitrogenous group, and is widely found as a structural element in nature, for example in the ... WebLike all octopuses, the male glass octopus has a hectocotylus. That is a modified arm that transfers sperm into the female’s mantle cavity. They are believed to have a non-detachable arm. This means that they cannot detach the arm and present it to their mate, unlike other species. As noted above, little is known about these creatures’ habits. Web04. apr 2024. · The experimental technique relied on the pallial nerve, which lies just inside the cephalopod mantle cavity, transmitting signals from the mantle to the brain and back. Exposed and accessible, the nerve can be hooked up to an electrode noninvasively. Even so, the procedure isn't always easy: "The octopuses like to pull out the electrode," says ... is east atlanta safe