Skeletal Flashcards
(25 cards)
functions of the skeletal system
support attachment of muscles protection of internal organs movement stability
RBC production in mammals
hematopoeisis
water/blood in a closed body with longitudinal and circular movements with alternate contractions
hydrostatic skeleton
animals with a hydrostatic skeleton
cnidarian (anemone), flatworms, nematodes (roundworm), annelids (earthworms)
external skeleton
exoskeleton
calcium carbonate crystals that are hard and inflexible
shells
animals with shells
crustaceans, mollusks
waxy material that serves as both skin & skeleton
cuticle
elastic protein in arthropod joints
resilin
internal skeleton
endoskeleton
skeleton of sponges
spongin fibers
skeleton of gastropods
cartilage
skeleton of sea urchin and star fish
ossicles
skeleton has a notochord instead of vertebral column
jawless fish (lamprey, hagfish)
axial cartilaginous skeleton on longitudinal axis
jawed fishes (shark, ray, bony fish)
the modifications for tetrapod skeleton
specialized invertebral discs
changes in shoulder
elongated appendages
primitive amphibians
icthyostega
acanthostega
structure of bone tissue
osteocytes in concentric rings around haversian canals
growing, soft bone tissue
trabeculae in bone interior
spongy tissue
mature hard tissue on bone surface
compact tissue
made of chondrocytes, fibers in intercellular matrix
found in joints and allows bone growth
cartilage
two body parts made of cartilage (never stop growing)
ear & nose
difference between invertebrate and vertebrate skeleton
invert: diverse skeleton material (hydrostatic, endo/exo)
vert: structurally varied (endo only)
inflammation of synovial membrane in joints
rheumatoid arthritis
