Cells in your body have specific functions (jobs).

Fat Cell White Blood Cell Red Blood CellPlatelet

Nerve Cell Muscle Cell Bone Cell

Cells with similar functions working together form a TISSUE.

Nerve Tissue

Blood

Adipose Tissue(fat tissue)

Muscle Tissue

Bone Tissue

EPITHELIAL TISSUE

(3 types)

Cuboidal cells

Squamous cells Columnar cells

Lining of lungs, heart, mouth, blood vessels, and skin.Lining of lungs, heart, mouth, blood vessels, and skin.

Lining of stomach, intestines, nose, ears, and tongueLining of stomach, intestines, nose, ears, and tongue

Lining of glands, kidneys tubules, ducts of glandsLining of glands, kidneys tubules, ducts of glands

CONNECTIVE TISSUEadipose tissue (fat cells)

cartilage (chondroblast cells)

blood (platelets, red and white blood cells)

bone (osteoblast cells)

cartilage bloodadipose bone

NERVOUS TISSUE• Brain

• Spinal Cord

• Nerves

Smooth Muscle Tissue

Cardiac Muscle Tissue

Muscle Tissue

Skeletal Muscle Tissue

SMOOTH MUSCLEFound in blood vessels, stomach, intestine, esophagus,

•Not striated

•Involuntary

•Not branched

•Slow to tire

SKELETAL MUSCLE

•Striated

•Voluntary

•Not branched

•Tires when working hard

attaches to and moves bones.

CARDIAC MUSCLEFound only in the heart.

•Striated

•Involuntary

•Branched

•Never tires

Two or more tissues working together make up an ORGAN.

Organs working together make up an ORGAN SYSTEM.

Homeostasisis the state of

having a stable internal

environment.

OBJECTIVES•Discuss the functions of the skeletal system.

•Describe the structure of a bone.

FUNCTIONS OF THE SKELETAL SYSTEM

FUNCTIONS OF THE SKELETAL SYSTEM

•Provides shape and support

•Allows movement

•Protects vital organs and tissues

•Stores certain materials

•Produces blood cells

The Skeletal System is the body’s living framework.

206 bones make up the skeleton.

Most of the skeletal system is made up of bones, ligaments, tendons, and cartilage (connective tissues).

The skeleton is divided into two parts.

•Axial skeleton•Appendicular skeleton

Axial Skeletonskull

ribsbreastbone

vertebral column

Appendicular Skeleton

shoulders

arms and hands

pelvis/hips

legs and feet

Axial SkeletonProtects the Organs.

Appendicular SkeletonProvides MovementProvides Movement

Development of Bone

Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings

Structure of Long BoneStructure of Long Bone

Figure 6.3a, c

                                                                              

Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings

Structure of Long BoneStructure of Long Bone

Figure 6.3a,b

Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings

Microscopic Structure of Bone: Compact BoneMicroscopic Structure of Bone: Compact Bone

Figure 6.5a, b

Ball and Socket A ball and socket joint allows for radial movement in almost any

direction. They are found in the hips and shoulders.

Hinge A hinge joint allows extension and retraction of an appendage.

Injuries to the skeletal and muscular systems.•Sprain – ligaments and tendons are torn or pulled beyond their stretching range.

•Fracture – a break in the bone.

•Dislocation – when a bone is forced out of its joint.

The End!The End!