Search results
Results from the WOW.Com Content Network
Chitin (C 8 H 13 O 5 N) n (/ ˈ k aɪ t ɪ n / KY-tin) is a long-chain polymer of N-acetylglucosamine, an amide derivative of glucose. Chitin is the second most abundant polysaccharide in nature (behind only cellulose); an estimated 1 billion tons of chitin are produced each year in the biosphere. [1]
Like cellulose, chitin is an abundant biopolymer that is relatively resistant to degradation. [17] Many mammals can digest chitin and the specific chitinase levels in vertebrate species are adapted to their feeding behaviours. [18] Certain fish are able to digest chitin. [19] Chitinases have been isolated from the stomachs of mammals, including ...
Supple chitin holds the sclerites together and connects the segments flexibly. Similar chitin connects the joints in the legs. Sclerotised tubular leg segments house the leg muscles, their nerves and attachments, leaving room for the passage of blood to and from the hemocoel. Hardened plates in the exoskeleton are called sclerites.
The two main blood vessels furnish smaller vessels to supply the parapodia and the gut. Blood flows forward in the dorsal vessel, above the gut, and returns down the body in the ventral vessel, beneath the gut. The blood vessels themselves are contractile, helping to push the blood along, so most species have no need of a heart.
Kidney and nerve tissue cells can form memories much like brain cells, one new study has found. ... the memories stored in non-brain cells in other parts of the body are memories strictly related ...
Insect blood or haemolymph's main function is that of transport and it bathes the insect's body organs. Making up usually less than 25% of an insect's body weight, it transports hormones, nutrients and wastes and has a role in, osmoregulation, temperature control, immunity, storage (water, carbohydrates and fats) and skeletal function. It also ...
The body cavity is a haemocoel, an open circulatory system, filled with a colourless fluid. The body covering is a cuticle that is replaced when the animal moults; it contains hardened (sclerotised) proteins and chitin but is not calcified. Each leg ends in one or more claws according to the species; in some species, the claws are modified as ...
Vegetables like carrots and potatoes deliver additional fiber and potassium, so it’s a double win. A 1-cup serving (sans bacon) contains 5 grams of filling fiber and 10 grams of protein. Black ...