CH 3: Skeletal System Flashcards
Parts of the skeleton system (4)
- Bones (skeleton)
- Joints
- Cartilages
- Ligaments
- Tendon (?????)
bone to bone
ligaments
bone to muscle
tendon
bones of the skull, vertebral column, and rib cage
- Axial skeleton
bones of the upper and lower limbs, shoulder and hip
- Appendicular skeleton
Skeletal system is divided into two divisions
Axial skeleton
Appendicular Skeleton
Difference between Axial Skeleton and Appendicular Skeleton
- Axial skeleton: bones of the skull, vertebral column, and rib cage
- Appendicular skeleton: bones of the upper and lower limbs, shoulder and hip
Functions of Bones (5)
- Support of the body
- Protection of soft organs
- Movement due to attached skeletal muscles
- Storage of minerals and fats
- Blood cell formation
- The adult skeleton has ____bones
206
- Two basic types of bone tissue
Compact bone
Spongy bone
Homogeneous bone tissue
Compact bone
Small needle-like pieces of bone
Many open spaces
Spongy Bone
Difference between
Compact Bone vs. Spongy Bone
o Compact bone
Homogeneous
o Spongy bone
Small needle-like pieces of bone
Many open spaces
Classification of bones on the basis of shape (4)
Long bone
Short bone
Flat bone
irregular Bone
Example of
Long bone
Short bone
Flat bone
irregular Bone
Long bone- humerus of arm
Short bone- carpals of wrist
Flat bone- parietal bone of skull
irregular bone- vertebra
Bones with typically longer than wide
long bones
Bones that have a shaft with heads at both ends
long bones
type of bones that contain mostly compact bone
long bones
Example of compact bone (2)
femur
humerus
Bone that is generally cube-shaped
short bones
Bones that contain mostly spongy bone
short bones
Example of spongy bone (2)
Carpals, tarsals
Thin and flattened bones
flat bones
Usually curved bones
Flat bones
Thin layers of compact bone around a layer of spongy bone
flat bones
Example of flat bones (3)
Skull, ribs, sternum
Irregular shape bones
Irregular bones
Do not fit into other bones classification categories
irregular bones
Example of irregular bones (2)
o Vertebrae, hip
Gross anatomy of long bone (2)
- Diaphysis
- Epiphysis
o Shaft (middle) of bone and composed of compact bone
Diaphysis
Ends of the bone and composed of mostly of spongy bone
- Epiphysis
Difference between
* Diaphysis
* Epiphysis
- Diaphysis
o Shaft (middle) and composed of compact bone - Epiphysis
o Ends of the bons and composed mostly of spongy bone
Structure of a long bone (5)
- Periosteum
- Sharpey’s fibers
- Arteries
- Articular cartilage
- Medularry Cavity
- Outside covering of the diaphysis
Periosteum
structure of a long bone with fibrous connective tissue membrane
Periosteum
secure periosteum to underlying bone
Sharpey’s fibers
supply bone cells with nutrients
Arteries
Structure of a long bone made of hyaline cartilage
Articular cartilage
Covers the external surface of the epiphyses
Articular cartilage
Decreases friction at joint surface
Articular cartilage
o Cavity of the shaft
Medularry Cavity
o Contains yellow marrow (mostly fat) in adults
Medularry Cavity
o Contains yellow marrow (mostly fat) in adults
Medularry Cavity
(mostly fat) in adults
yellow marrow
(for blood cell formation) in infants
red marrow
- Surface features of bones
bone markings
- Sites of attachments for muscles,
bone markings
- Passages for nerves and blood vessels
bone markings
- Categories of bone markings (2)
Projections and processes
Depressions or cavities
grow out from the bone surface
Projections and processes
Depressions or cavities
indentations
Large, rounded projection; may be roughened
tuberosity
Narrow ridge of bone; usually prominent
crest
Very large, blunt, irregularly shaped process (ex: femur)
trochanter
Narrow ridge of bone; less prominent
Line
Small, rounded projection
tubercle
Raised area on or above a condyle
Epicondyle
Sharp. Slender, often pointed projection
spine
Any body prominence
Process
Projections that help to form joints (4)
Heads
Facet
Condyle
Ramus
-For passage of blood vessels and nerves
Depressions and Openings
Depressions and Openings (7)
Groove
Fissure
Foramen
Notch
Meatus
Sinus
Fossa
Bony expansion carried on a narrow neck
heads
Smooth, nearly flat articular surface
facet
Rounded articular projection
condyle
Armlike bar of bone
Ramus
Furrow
groove
Narrow, slit-like opening
fissure
Round and oval opening through a bone
Foramen
Indentation at the edge of a structure
notch
Canal- or tunnel-like passageway
meatus
Cavity within a bone, filled with air and lined with mucous membrane
sinus
Shallow, basin like depression in a bone, often serving as an articular surface
Fossa
- In embryos, the skeleton is primarily
hyaline cartilage
- During development, much of this cartilage is replaced by
bone