Skeletal System Study Guide Answers
2. Protection, Storage of minerals, movement, blood cell formation
3. Fixed—no movement; skull
Ball-and-Socket—allows movement in all directions; shoulder and hip
Pivot –rotating or rolling motion; neck
Hinge—back and forth movement; elbow and knee
Gliding—sliding movement; wrists and ankles
Cartilage—flexible, tough connective tissue (found near joints); what a baby’s skeleton is
mostly made of
Joint—a place where 2 or more bones meet
Ligament—a band of connective tissue that joins bones
Osteoblasts—bone producing cells
Osteoporosis—a disease in which the bones become weak
Sprain—when a ligament is stretched too far
Arthritis—a disease in which the joints hurt and become stiff
Marrow—found inside of bones (red and yellow)
Fracture—broken bone
Dislocated joint—an injury where one or more bones is moved out of place
Compact bone—bone that is rigid and dense with no open space
Spongy bone—bone tissue that has many open spaces and provides support for the bone
Yellow bone marrow—store fat in bone cavity
Red bone marrow—produces blood cells