Card Set Information
Bio: locomotion (muslce + skeletal)
movement from one place to another
organism that does not move
tiny flapping hairs
false feet, extension of cytoplasm
How does an earthworm crawl?
"anchors" in earthworm
3 major functions of the skeleton
protection of internal organs
consists of fluid held under pressure in a closed body compartment
: earthworm, hydra, jellyfish
rigid external skeleton
usually made of chitin
hard or leathery
: insects, crabs, clams
cartilage or a combination of cartilage + bone
supports the axis (trunk) of body
axis (trunk) of body
skull, backbone, rib cage
supports the paired appendages
shoulder girdle, upper limbs, pelvic girdle, lower limbs
What covers the bones?
sheet of fibrous connective tissue
What cushions joints?
Bone cells live in a matrix of...?
...flexible protein fibers and hard calcium salts
Protein fibers resist __.
Calcium salts resist __.
central cavity of bone; stores fat
spongy bone; produces blood cells
Smooth (Visceral) muscle
involuntary; digestive system
Striated (skeletal) muscle
voluntary; biceps, triceps
individual muscle cell
plasma membrane enclosing the muscle fiber
equivalent of cytoplasm in a muscle cell
in the sarcoplasm, they allow transport of substances throughout the muscle fiber
(muscle cell) stores calcium
What are the myofibrils made up of?
the smallest functional units of a muscle
what are sarcomeres composed of?
filaments of myosin and actin, which are responsible for muscle contraction
thick filament with a globular head at one end
composed of actin, tropomyasin, + troponin is attached to a Z disk
inflammation of the joints
bones become brittle
break in bone or cartilage
injury to a ligament that results from overuse or trauma
muscle or tendon stretching or tearing
black + blue
inflammation of the tendons
Where is cartilage found in humans?
nose, ears, trachea, at the end of bones
make movement of the skeleton possible
back and forth
ex: elbow, knee
: shoulder, hip
can move in a
bones of the skull