The Skeletal System Function Support Protect Organs Produce Blood Movement Store Calcium Store Fat

Form

Bones Strong

Light Living Tissue Non Living

Tissue Nerves Blood Vessels Connective

Tissue

Joints Where two or

more bones come together

Needed for movement

Usually surrounded by cartilage or a fluid filled bursa (sack)

Amount of Movement depends on joint type

Mammals Similar bone design and

structure Individual differences related to

size, number and function are common but form is very close

Skeleton on fish Some made of

bone (Pike, Walleye, Salmon, Blue Gill etc)

Some made entirely of cartilage (Shark, Sting Ray)

Skeleton of Birds Light Filled with many

pores and holes Light weight for

flight

Skeleton Reptiles Form of Skeleton

matches function Very diverse

Skeleton forms

Support for Sponges and Coral Fibrous network of

Calcified minerals Algae gives Coral Color Very simple Does not allow

movement

Mollusks and shelled Organisms Protection provided

by shell Shell made of

calcium rich minerals

Different organisms have different shell designs

Internal structure is provided by hydro-pressure (Water Pressure)

Arthropods (Insects and Crustaceans) Exoskeleton External skeleton made

a polysaccharide called chitin

Growth is through molting

Exoskeleton limits size of organism

Common in Invertebrates (animals with out backbones)

Worms Support is

internal Hydro pressure

Protection is through tough muscular outer membrane

Plants Xylem= Cell type that

provides structure to trees (wood)

Hydro pressure water provides turgor or internal support through storage in the vacuole

Plant cells have cell walls made of cellulose for support

Phloem, or bark provides protection

Protozoan Support is

internal based on internal hydro pressure

Protection is through a semi permeable cell membrane

Bacteria Cell wall provides

protection and support