Squid and octopi do not have a single bone in their body. How do they maintain their structure and actually move? a. By taking in oxygen in the water c. Their cartilage is very strong like bones. b. Water helps them move and hold their structure. d. Eating plankton helps them with structure and movement
Answers
Answer:
Explanation:
Water helps them move and hold their structure.
A)The Mouth of an Octopus
The octopus uses these gills to breathe. Water is brought into the octopus mouth and is then passed through the gills back into the body of water. As the water is pushed over the surface of the gills, oxygen is picked up by the blood in the capillaries of the gills.
b)Cartilage, which is also found in squid and octopus, is a type of protein which is a natural polymer. Cartilage is found in all living things, including sharks. ... Octopi live around caves, which are made of stone (not a polymer) and some smaller species can be found among coral reefs.
c)Octopuses and squids move by "jet propulsion", sucking water into a muscular sac in the mantle cavity surrounding their bodies and quickly expelling it out a narrow siphon. Both octopuses and squids are related to snails and other molluscs.
d)At that size, their diet is primarily conformed of plankton. They may start with nanoplankton progressing to microplankton and mesoplankton as they grow in size. Smaller octopus species which never grow beyond 10 or 12 inches in length will usually stick to a diet of sea gastropods and other marine mollusks.