Skeletal System-Functions

• Provides shape and support• Allows movement (provides a surface to

which muscles attach)• Protect delicate tissues and organs• Storage of minerals (calcium and

phosphorus)• Produces blood cells

Bone Structure• compact bone: hard and dense for strength

– Composed primarily of minerals• spongy bone: spaces for lower weight• Marrow: forms blood cells• veins and arteries: to bring nutrients to the cells• nerves: to collect information from the tissue and to

send information to the brain

Parts of Bone

veinartery

spongy bonebone

marrowcompactbone

Parts of Bone: Cross Sectionveins,arteries,nerves

compact bone

spongy bone

bonemarrow

bonemaking cells

compact bone tissue

nuclei of bone cells

tubes where blood vesselsand nerves go through

compact bone

spongy bone

Bone Tissues

Bone Tissues

spongy

Bone Tissues

compact

Bone Tissues

marrow

JOINTS

Joints: any place where two bones come close together

1. Immovable (skull)2. Movable (hinge, ball & socket, pivot,

gliding)What holds the bones together at the joints?ligaments

Type of Joint?

shoulder/upper arm

ball and socket

Type of Joint?

ball and socket

Type of Joint?

gliding

Type of Joint?

gliding

Type of Joint?

immovable

Type of Joint?

pivot

Type of Joint?

pivot

Type of Joint?

hinge

Type of Joint?

hinge