Anatomy Unit 2 Concept 1: The skeletal system

Hematopoiesis

blood cell formation in red bone marrow

cartilage

a flexible connective tussue
functions: lubricates the bone, supports the structure of the body

ligament

Connects bone to bone

short bands of tough, yet flexible, dense connective tissue

tendon

connects muscles to bones

dense connective tissue

joint (articulation)

where 2 or more bones connect

use ligaments, cartilage, and tendons to aid in movement and flexibility

intervertebral discs

separate and cushion the vertebrae (an irregular bone)

sesamoid bones

short bone that is shaped like a sesame seed, embedded within tendons

osteon

basic structural unit of compact bone, long cylinders that act as tiny weight bearing pillars

lamellae

hollow tubes in the osteons that have tiny salts and collagen fibers to resist torsion stress

central canal

also called the haversian canal, runs through the middle of each osteon and contains blood vessels and nerve fibers

trabeculae

in spongy bone, tiny bone struts that are key for helping the bone resists stress, where bone marrow is

lacunae

gaps between the lamellae, where osteocytes are housed

osteocyte

maintain healthy bone structure by managing the osteoblasts and osteoclasts in response to stimuli

osteoblast

build and construct bones by calcifying bones as it forms
blasts: build

osteoclast

absorbs bone tissue that is not needed or degenerating
clasts: chaos (destruction)

Ossification

process of bone tissue formation

fracture

a break in a bone