Skeletal Flashcards
Bones making up the limbs, pelvis, and shoulder areas
Appendicular skeleton
The site of close approximation of two or more bones
Articulation
Thin layer of hyaline cartilage covering the surface of the epiphysis
Articular cartilage
The skeleton that forms the central supporting axis of the body
Axial skeleton
Small bones of the wrist
Carpal bones
Rounded knob; usually fits into a fossa on another bone to form a joint
Condyle
A moderately raised ridge
Crest
The central shaft-like portion of a long bone
Diaphysis
Thin epithelial membrane lining the inside of the medullary cavity
Endosteum
A bump superior to a condyle
Epicondyle
Layer of cartilage separating the epiphysis from the diaphysis at each end of a long bone It is the site where bone growth occurs
Epiphyseal plate
The head of each end of a long bone
Epiphysis
Portion of the pelvis that extends between the edges of the iliac bones
False pelvis
Un-fused area of an infant’s skull
Fontanel
A furrow or depression
Fossa
A round opening in a bone, usually a passageway for vessels and nerves
Foramen
The prominent, expanded end of a bone
Head
A central canal in compact bone containing blood vessels and nerves; surrounded by lamellae
Haversian canal
Process in the fetus whereby fibrous connective tissue
evolves into bone
Intramembranous ossification
An exaggerated thoracic curvature
Kyphosis
Tiny gaps between rings of lamellae in compact bone
Lacunae
Concentric rings of matrix surrounding Haversian canal in compact bone
Lamellae
A tube-like opening
Meatus
The central hollow portion of a long bone that contains bone marrow
Medullary cavity
Bone tissue
Osseous tissue
The creation of new bone
Ossification
Bone-forming cell
Osteoblast
Bone cells that dissolve old or unhealthy bone
Osteoclasts
Mature osteoblast
Osteocyte
Basic structural unit of compact bone consisting of a Haversian canal and surrounding lamellae
Osteon
Dense fibrous membrane covering the diaphysis
Periosteum
A projection or raised area
Process
Reshaping or reconstructing part of a bone
Remodeling
The destruction of old bone; part of the bone remodeling process
Resorption
A lateral curvature of the spine
Scoliosis
Cavity in the skull filled with air
Sinus
Also called cancellous bone. It is found in the ends of long bones and the middle of most other bones
Spongy bone
Groove or elongated depression
Sulcus
Immovable joints of the skull
Sutures
Latticework of osseous tissue that makes up the structure of spongy or cancellous bone
Trabecula
A large process. It is found only on the femur
Trochanter
Portion of the pelvis that extends between the pelvic brim
True pelvis
A small, rounded process
Tubercle
A rough, raised bump, usually for muscle attachment
Tuberosity
are large molecules consisting of polysaccharides attached to core proteins, similar to the way needles of a pine tree are attached to the tree’s branches.
Proteoglycans
Most of the mineral in bone is in the form of calcium phosphate crystals
hydroxyapatite
contains substances that are essential for the make-up of our bones since the cartilages, tendons, ligaments, and even our bones, are connective tissues.
Extracellular Matrix
large molecules consisting of polysaccharides attached
to core proteins, similar to the way needles of a pine tree are attached to the tree’s branches.
Proteoglycans
Four categories of bone, based on their shape,
- Long Bone
1.1 Diaphysis - Shaft or body
1.2 Epiphysis - head of each end of a long bone
1.3 Medullary Activity - marrow cavity - Short Bone
- Flat Bone
- Irregular Bone
- are longer than they are wide and have knobby ends where the articulations form.
- are hollow in the middle and more solid on the ends.
Long bone
It is covered by dense connective tissues on the outside called _____________ and a thinner inner lining
called endosteum. Long bones have several parts.
Perioteum
are equal in length and width, making them nearly cube-shaped. Examples include most bones of the ankles and the wrists.
Short bones
are thin and provide both protection and surfaces for muscle attachments. The bones of the skull, sternum, and ribs are all at bones.
Flat Bones
have complex shapes, such as those of the face and vertebral column.
Irregular bones
FUNCTIONS OF THE SKELETAL SYSTEM
- Support
- Protection
- Movement
- Blood cell production
- Storage
It supports and stabilizes surrounding tissues such as muscles, blood and lymphatic vessels, nerves, fat, and skin.
Support
It protects vital organs of the body such as the brain, spinal cord, the heart, and lungs, and it protects other soft tissues of the body.
Protection
It assists in body movement by providing attachments for muscles that pull on the bones that act as levers.
Movement