chapter 6 bone diagram

identify hidden label

compact bone.

Dense outer bone tissue that provides strength, protection, and

support.

identify hidden label

spongy bone

Porous inner bone; trabeculae reduce weight and house marrow.

identify hidden label

medullary cavity

Hollow space inside a long bone that contains marrow.

identify hidden label

periosteum overview

Membrane covering outer bone, except at joint surfaces; nourishes

and helps repair bone.

identify hidden label

interstitial lamellae

Fragments of older osteons filling spaces between osteons.

identify hidden label

circumferential lamellae (outer)

Layers of bone matrix circling the outer bone surface; resist

twisting.

identify hidden label

concentric lamellae

Rings of mineralized matrix around the central canal of an

osteon.

identify hidden label

Blood vessels

Supply oxygen and nutrients to bone and remove wastes.

identify hidden label

Lymphatic vessel (upper)

Helps drain interstitial fluid from bone tissues.

identify hidden label

Lacuna

Tiny space within bone matrix that houses an osteocyte.

identify hidden label

Canaliculi

Microscopic channels connecting lacunae for nutrient and waste

exchange.

identify hidden label

Osteocyte

Mature bone cell that maintains mineralized bone matrix.

identify hidden label

Osteon (Haversian system)

Structural unit of compact bone: concentric lamellae around a

central canal.

identify hidden label

Medullary cavity (detail)

Marrow-containing central cavity, shown beside the spongy bone.

identify hidden label

Trabeculae

Thin branching plates or struts that form the framework of spongy

bone.

identify hidden label

Circumferential lamellae (inner)

Layers of matrix surrounding the inner surface of compact bone.

identify hidden label

Spongy bone (detail)

Lattice-like tissue containing trabeculae and marrow spaces.

identify hidden label

Compact bone (detail)

Dense bone organized into osteons; resists mechanical stress.

identify hidden label

Lymphatic vessel (lower)

Drains excess tissue fluid and supports fluid balance.

identify hidden label

Periosteal vein

Carries blood away from tissues of the periosteum.

identify hidden label

Periosteal artery

Delivers oxygenated blood to the periosteum.

identify hidden label

Periosteum: outer fibrous layer

Tough outer connective-tissue layer that protects and anchors

tendons/ligaments

identify hidden label

Periosteum: inner osteogenic layer

Cell-rich inner layer involved in bone growth and fracture

repair.

identify hidden label

Central (Haversian) canal

Longitudinal canal containing vessels and nerves at the center of

an osteon.

identify hidden label

Perforating (Volkmann’s) canal

Transverse canal carrying blood vessels and nerves between

central canals and periosteum.

identify hidden label