Cephalopods - feeding and digestion in molluscs, Biology

Cephalopods - Feeding and Digestion in Molluscs

Cephalopods are carnivorous. Tentacles or arms are food capturing organs. The number of tentacles changes in different cephalopods. Sepia has ten arms, Octopus has eight and Nautilus has around 90 tentacles. Sepia, as other squids and cuttlefishes, has four pairs of short and heavy tentacles called arms and a pair of long structures termed as tentacles. The inner surface of the arms is provided along with suckers which are stalked, cup-shaped and adhesive in nature. The suckers are provided along with horny rings and hooks. In the mobile tentacles the suckers are present just only at the flattened ends. The arms aid in holding the prey tightly after it is captured. Suckers are available in the arms of Octopus as well but they are stalk less and devoid of horny rings and hooks. Cephalopods, besides radula possess a powerful pair of beak shaped jaws in the buccal cavity. The jaws are employed for tearing and biting the prey before the tongue like action of radula pulls the food down and aids in swallowing. Octopods inject the prey with poison or with no a bite with jaws and the prey are flooded with enzymes. After that the partially digested food passes into gut. When feeding on shelled gastropods, octopods drill a hole in the prey with radula and then inject poison into the animal by the hole. Whereas cuttlefish feed on surface inhabiting organisms such as shrimps and crabs, octopods feed on a range of prey including clams, snails and crustaceans. Nautilus is a scavenger-predator feeding specially on decapod crustaceans, specifically hermit crabs.

Posted Date: 2/4/2013 3:15:23 AM | Location : United States







Related Discussions:- Cephalopods - feeding and digestion in molluscs, Assignment Help, Ask Question on Cephalopods - feeding and digestion in molluscs, Get Answer, Expert's Help, Cephalopods - feeding and digestion in molluscs Discussions

Write discussion on Cephalopods - feeding and digestion in molluscs
Your posts are moderated
Related Questions
some deliveries of baby occur early na. y is it so?

What is ammensalim? Ammensalism is the ecological interaction in which an individual harms another without obtaining advanatage. Ammensalism is an inharmonious (negative) ecolo

Q. What is the important condition for a protein to be identical to another protein? For a protein to be identical to another protein it is necessary for the sequence of amino

what about cytoplasmic sex determination

At 1 AM, a researcher places a healthy squid giant axon in a bath of normal squid physiological extracellular saline and internally perfuses the axon with normal squid intracellula

What is Diagnosis of Heart Disease in the Newborn ? Clinical diagnosis of heart disease in the newborn can be quite challenging. Manifestations of potentially life threatening

tell me best topic related to botany

Different types of stems (a)  Monocots. Secure stems of various plants such as bamboo, sugar cane and corn. Cut every of the stems crosswise with a very sharp knife or razor bl

Define the Healing Process - Root Canal Treatment The course of healing varies and depends on: 1)  Initial size of the lesion: It takes longer for larger periradicular lesio

Em u l sio n preparation Frozen deboned meat, fat and by-products are tempered at 0° to 4° C for 12to 15 hr and cut into pieces and coarse minced by passing through 8, 10 o