Chapter 44?? Flashcards
What are three types of skeletons?
Ends . . Eco . . Hydrostatic
Structures that serve one or more functions related to support, protect, and in locomotion
Skeleton
Combination of muscles and water based fluids
Hydrostatic skeleton
Surrounds and protects body
Exoskeleton
What are arthropods’ exoskeletons made of
Chitin
Internal structures that only protect internal organs and other structures
Endoskeleton
What are the two parts of the vertebral skeleton
Axial and appendicular
Main longitudinal axis
Axial
Limbs, bones, and girdles
Appendicular
Formed when two or more bones come together
Joint
Living, dynamic tissue
None
Form bone
Osteoblasts
Break bone
Osteoclasts
What links bones to muscles?
Tendons
Cylindrical bundles in muscle fibers
Myofibrils
Bundle made of muscle fibers
Fascicle
Muscle fibers are made of what?
Myofibrils
A wide band of myosin
A band
Narrow region in center of A band, space between two sets of thin filaments
H zone
In center of H zones, proteins that link central regions of adjacent thick filaments
M line
Two sets of thin filaments anchored to a net work of proteins at this point
z line
What does 2 successive Z lines make?
Sarcomere
Contains portions of thin filaments that do not overlap thick filaments
I band
Extend from surface of myosin toward thin filaments
Cross bridges
