The Skeletal System introduction

The Skeletal System

Introduction

• Axial skeleton: Central, supporting axis 

• Appendicular skeleton: Bones of the limbs, pelvic, and shoulder areas

• The adult skeleton has 206 bones: the axial skeleton has 80 bones and the appendicular skeleton has 126 bones.

• The surfaces of bones have surface markings (ridges, depressions, bumps, pores, and projections); these provide routes for blood vessels and nerves, surfaces for muscle attachment, and areas for joint formation

The Skeleton

• Axial skeleton: Central, supporting axis 

• Appendicular skeleton: Bones of the limbs, pelvic, and shoulder areas

Multiple Choice

Which skeleton contains 206 bones?

• Adult Skeleton

• Axial skeleton

• Appendicular

Multiple Select

The appendicular skeleton

• Includes bones of the legs

• includes the shoulder

• includes the spine

• includes the pelvis

• includes the skull

Multiple Choice

Rounded knob usually fits into a fossa on another bone to form a joint

• crest

• Epicondyle

• fossa

• Condyle

Multiple Choice

A flat surface is a

• Facet

• Fossa

• Foramen

• meatus

Multiple Choice

The prominent, expanded end of a bone

• process

• Sulcus

• Head

• Trochanter

Multiple Choice

A rough, raised bump, usually for muscle attachment

• Tubercle

• Tuberosity

• meatus