CELLS

• BUILDING BLOCKS OF ALL THINGS

• EACH HAS A SPECIAL JOB

• THE SMALLEST LEVEL OF ORGANIZATION

ABSORBING CELLS

• ABSORB THINGS

ASSEMBLY CELLS

• PUT TOGETHER IMPORTANT SUBSTANCES– HORMONES –

CHEMICAL MESSENGERS THAT REGULATE CERTAIN ACTIVITIES OF THE BODY

– ENZYMES – CHEMICALS THAT BREAK DOWN FOOD

CELLS FOR MOVEMENT

MUSCLE CELLS

TISSUES

GROUP OF SIMILAR CELLS DOING THE SAME THING

2ND LEVEL OF ORGANIZATION

MUSCLE TISSUE

• BY CONTRACTING AND PULLING ON BONES – MAKES BODY MOVE

• LINE WALLS OF STRUCTURES INSIDE BODY

• FOUND IN THE HEART – ENABLES IT TO PUMP

CONNECTIVE TISSUE

• PROVIDES SUPPORT FOR THE BODY– BONE

– BLOOD

– FAT

NERVE TISSUE

CARRIES MESSAGES BACK AND FORTH BETWEEN BRAIN AND SPINAL CORD AND THE REST OF THE BODY

EPITHELIAL TISSUE

• FORMS A PROTECTIVE SURFACE ON THE OUTSIDE OF THE BODY– SKIN

– CAVITIES OF THE MOUTH

– THROAT

– EARS

– STOMACH

ORGANS

DIFFERENT TYPES OF TISSUE COMBINE TO FORM ORGANS

EX: HEART – MUSCLE, EPITHELIAL, NERVE AND

CONNECTIVE TISSUES

3RD LEVEL OF ORGANIZATION

ORGAN SYSTEM• A GROUP OF ORGANS THAT WORK

TOGETHER

• 4th LEVEL OF ORGANIZATION

• NO SYSTEM WORKS ALONE– CIRCULATORY SYSTEM BRINGS FOOD

AND OXYGEN TO THE BODY AND REMOVES WASTE