Skeletal System

Terms

Using page 30 write the terms and their definitions that you do not know

Using page 31 label and define the planes of the body

Pre/WR/SuffVocab

arthro Cardio Cephalo Chondro Dermo Myo Os/osteo Thoraco Tri Bi

Superficial Deep Articulation Axial skeleton Appendicular skeleton Agonist Antagonist Synergist

Please Read pgs 39-46

Functions

SupportProtect Produce blood cellsStore minerals and fatProvide movement

Types of Bones

Long Short FlatIrregular

Long bone

= longer than they are wide, tubular shape

Examples: femur, tibia, fibula, humerus, radius, ulna

Compact bone: dense (found at ends)

Spongy bone: cancellous (found in shaft)

Hematopoiesis = red blood cell formation

Occurs in spongy bone

Short bone

= cube shape, lengths and widths equal

Example:

Metacarpals

Metatarsals

phalanges

Flat bone

= plate like, broad surfaces

Examples:

Cranium

Sternum

Ribs

pelvis

Irregular bone

= varied shapes with connections for other bones

Examples:

Vertebrae

Patella

Sphenoid

Joints

Classified by:

Amount of movement they allow

According to their structure

3 Types

Synarthrosis

Amphiarthrosis

Diarthrosis

Synarthrosis

Sometimes fused together

Examples:

Innominate (ischium, ilium, pubic)

Sacrum

Cranium (sutures)

Joints

Amphiarthrosis

= slightly moveable

Examples:

Pubic symphysis

Manubrium & Sternum

Coraco-acromial jt.

Joints

Diarthrosis

Aka synovial

= freely moveable

6 types

1. saddle Thumb, freely moveable

2. ball and socket Hip, shoulder. Movements in all planes

3. Pivot Prox radius/ulna. Rotation only

4. Hinge Elbow, knee. Flexion and extension

5. Gliding Carpas/tarsals, ribs/vertebrae.

6. Condyloid Scaphoid/radius, occipital/atlas. All movements but rotation