Structural Material 2 Flashcards
Collagen is a protein used by many types of animals but mainly in _
Vertebrates
A third of all human protein is
Collagen
Several collagen molecules come together to form _
Twisted fibers
Twisted fibers used to make strong but flexible _
Connective tissue
Connective tissue such as (2)
Cartilage
Skin
A fibrous protein _ is found in all kinds of animals
Keratin
Keratin’s properties make it perfect for creating a _ coating on body (2)
Flexible
Waterproof
Keratin found in skin, _ and _
Scales
Hair
Keratin also in fingernails, _ and _
Claws
Horns
Keratin also in hooves and _
Feathers
Hydroxyapatite is a natural form of _
Calcium phosphate
Hydroxyapatite is used in vertebrate (2)
Bones
Teeth
Hydroxyapatite makes up about _ percent of human skeleton weight
70
Tooth enamel which contains Hydroxyapatite is _
Hardest biological material
Mollusks, crustaceans, and other shellfish are hardened by _
Aragonite
Aragonite is a form of
Calcium carbonate
Raw ingredients of aragonite are extracted form _
Seawater
Sea shell made from layers of _
Tiny crystals
Sponge is protected by microscopic spikes of
Silica
Bodies of some _ are constructed from particles made from silica (2)
Sponges
Corals
Silica is a glasslike substance, naturally occurring form of _
Silicone dioxide
In hard skeletons and shells _ in spaces between cells provides strength
Solid crystals
