Cells in your body have specific functions (jobs). Fat Cell White Blood Cell Red Blood Cell Platelet Nerve Cell Bone Cell Muscle Cell

Cells with similar functions working together form a TISSUE. Muscle Tissue Nerve Tissue Adipose Tissue (fat tissue) Blood Bone Tissue

EPITHELIAL TISSUE (3 types) Cuboidal cells Squamous cells Lining of glands, kidneys tubules, ducts of glands Columnar cells Squamous cells Lining of lungs, heart, mouth, blood vessels, and skin. Lining of stomach, intestines, nose, ears, and tongue

CONNECTIVE TISSUE adipose tissue (fat cells) cartilage (chondroblast cells) blood (platelets, red and white blood cells) bone (osteoblast cells) adipose cartilage blood bone

NERVOUS TISSUE Brain Spinal Cord Nerves

Skeletal Muscle Tissue Smooth Muscle Tissue Skeletal Muscle Tissue Cardiac Muscle Tissue

SMOOTH MUSCLE Not striated Involuntary Not branched Slow to tire Found in blood vessels, stomach, intestine, esophagus, Not striated Involuntary Not branched Slow to tire

Tires when working hard SKELETAL MUSCLE attaches to and moves bones. Striated Voluntary Not branched Tires when working hard

CARDIAC MUSCLE Found 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.

is the state of having a stable internal environment. Homeostasis is 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 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. The Skeletal System is the body’s living framework.

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

Appendicular Skeleton Axial Skeleton Appendicular Skeleton skull shoulders ribs breastbone arms and hands vertebral column pelvis/hips legs and feet

Axial Skeleton Protects the Organs.

Appendicular Skeleton Provides Movement

Development of Bone

                                                                              

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!