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Skeletal System
Biology 1 Honors
30
Biology
10th Grade
03/31/2011

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Term
206 bones
Definition
How many bones are in the human body?
Term
Axial Skeleton
Definition
Includes the skull, the vertebral column, the ribs, & the sternum
Term
Appendicular Skeleton
Definition
the bones of the arms, hands, legs, feet, shoulder, and hips
Term
joints
Definition
where 2 or more bones meet; facilitate movement of bones in relation to each other
Term
ligament
Definition
tough band of connective tissue that attaches one bone to another
Term
bursae
Definition
fluid sacs within shoulders and knees that reduce friction and keep bones from rubbing against each other
Term
Immovable, slightly movable, and freely movable
Definition
3 types of joints are...
Term
immovable joint
Definition
suture; example: skull joint
Term
freely movable joint
Definition
ball-and-socket, pivot, hinge, and gliding
Term
Hip joint & Shoulder Joint
Definition
Examples of a ball-and-socket joint
Term
Elbow joint
Definition
Example of a pivot joint
Term
Knee & Elbow joints
Definition
Examples of a hinge joint
Term
Ankle, wrist, and vertebrael joints
Definition
Examples of a gliding joint
Term
Ball-and-Socket joint
Definition
movement in many directions
Term
Pivot joint
Definition
one bone rotating around another
Term
hinge joint
Definition
back and forth motion
Term
gliding joint
Definition
one bone sliding in 2 directions
Term
sprain
Definition
forcible twisting of a joint, results in injury to the bursae, ligaments, or tendons
Term
arthritis
Definition
joint disease, inflammation of the joints
Term
tendons
Definition
thick bands of connective tissue, attach muscles to bones
Term
compact bone
Definition
layer that surrounds every bone
Term
spongy and compact
Definition
2 types of bone...
Term
living
Definition
Are bones living or nonliving?
Term
spongy bone
Definition
contains many holes and spaces and is surrounded by compact bone
Term
osteon (Harversian systems)
Definition
tubular structures that run the length of compact bones
Term
osteocytes
Definition
living bone cells; receive oxygen and nutrients from small blood vessels running with the osteon systems
Term
1. supports the body
2. stores minerals (calcium and phosphorus)
3. protects internal organs
4. provides a place for muscle attachment
5. produces blood cells
Definition
The skeletal system...
Term
red marrow
Definition
found in humerus, femur, sternum, ribs, vertebrae, and pelvis & is the site of red & white blood cells and blood clotting
Term
yellow marrow
Definition
consists of stored fat
Term
osteoporosis
Definition
disease involving the loss of bone volume & mineral content causing bone to become porus and brittle
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