Skeletal System Flashcards
Function of bones (5)
Support, storage of minerals, blood cell production, protection of internal tissues/ organs, leverage
Dense or cortical, with a hard exterior layer
Almost forms the entire shaft
Compact bones
Spongy bones
Cancellous bones
Space surrounded by the cortex of a long bone
Medullary cavity /marrow cavity
Thin layer of hyaline cartilage that covers the joint of a bone
Articular cartilage
Membrane that covers the surface of a bone
Periosteum
Which location does periosteum not cover
Articular cartilage
Membrane that lines the marrow cavity
Endosteum
Bone-producing cells
Osteoblasts
For remodeling/ repair after fracture
Osteoblasts
Bone - destroying cells
Osteoclasts
In young animals, the medullary cavity is filled with a _____ which is gradually replaced by a _____ as it ages
Red marrow, yellow marrow
It function as levers and aid in support, locomotion, and prehension
Long bones
Interior is composed of spongy bone filled with marrow spaces
Short bones
Bones that contain air spaces/ sinuses
Pneumatic bones
Layer of hyaline cartilage within the metaphysis that separates the diaphysis from epiphysis of an immature bone
Epiphyseal cartilage
Either end of a long bone
Epiphysis
Shaft of a long bone between two epiphyses
Diaphysis
Flared area adjacent to the epiphysis of a mature bonet
Metaphysis.
Area where the cortical bone become thinner
Metaphysis
Area in which a bone can increase in length
Epiphyseal cartilage
Maintains bone tissue
Osteocyte
Cuboid or approximately equal in all dimensions
Short bones
Bone protection of vital organs
Flat bones
Bones in neck, back, chest,head
Axial skeleton
Contain the middle and inner ears
Temporal bones
Supports the brain and pituitary gland
Sphenoid bone
Presents numerous openings for passage of the olfactory nerves
Ethmoid bone
Separates the nasal passages
Vomer bone
Bounded dorsally by the nasal bones
Nasal cavity
Contains all of the lower teeth and gives attachment to some of the muscles associated with chewing and swallowing
Mandible
Contain the teeth of the upper dental arcade
Maxilla and incisive bones
Animal with most cervical vertebrae
Chicken
First cervical vertebra
Atlas
Second cervical vertebra
Axis
Accommodate the large range of motion of the neck
Cervical vertebrae
Well-developed spinous processes and articular facets for the ribs
Thoracic vertebrae
Large, flat transverse process that project laterad
Lumbar vertebrae
Fused to form a single wedge -shaped bone, the sacrum
Sacral vertebrae
Forms the ventral part of the bony thorax
Sternum
Gives attachment to the coastal cartilages of the ribs as well as providing a bony origin for the pectoral muscles
Sternum
Cranial extremity of the sternum
Manubrium
Middle portion of the sternum
Body
Caudal extremity of the stemum
Xiphoid process
Form the lateral walls of the bony thorax
Ribs
Arm bone
Humerus
Shoulder blade
Scapula
Collarbone
Clavicle
Bones of the true leg
Tibia and fibula
Corresponds to the human ankle
Tarsus
Rostal bone in swine
Os rostri
Cardiac skeleton of bovine
Os cordis
Penile bone in the canine family, also in gorilla and chimpanzee
Os penis
Ads sexual reproduction by maintaining sufficient stiffness during sexual penetration
Os penis
The thickest and strongest portion of the sternum
Manubrium
What role do collagen and glycosaminoglycans play in bone composition?
Provide resilience and toughness to bones
They provide resilience and toughness to bones
Collagen and glycosiminoglycans
2 main types of bone composition
Organic framework
Inorganic component
Classifications of bones (6)
Long bones
Short bones
Flat bones
Sesamoid bones
Pneumatic bones
Irregular bones
Functions of sesamoid bones
Reduce friction
Increase leverage
Change the direction of pull
Functions of long bones
Levers, aid in support, locomotion, and pretension
Unpaired bones on the median plane
Irregular bones
Bones that provide protection, support, and muscular attachment
Irregular bones
3 divisions of the skeleton
Axial
Appendicular
Visceral
Bones that make up the cranial part of the skull (7)
Occipital
Parietal
Interparietal
Frontal
Temporal
Sphenoid
Ethmoid
What do temporal bones contain?
Middle and inner ears
What is the role of the sphenoid bone
Supports brain and pituitary gland
Function of ethmoid bone
Provide openings for the passage of olfactory nerves
Bony socket that protects the eye
Orbit
What is the orbit in skull
Bony socket the protects the eye
What bones surround the orbit
Frontal, lacrimal, and zygomatic bones
Function of the vomer bone
Separates nasal passages
Bony basis of the tail
Caudal vertebrae
3 parts of sternum
Manubrium
Body
Xiphoid process
What is the difference between the radius and ulna in mammals in birds?
In mammals, radius is larger than ulna
In birds, radius is smaller than ulna
Composed of two rows of small bones
Carpus
Distal to the carpus
Metacarpus
How many digits vary among species?
1-5
Phalanges in horses
Proximal phalanx
Middle phalanx
Distal phalanx
Coffin bone
Distal phalanx
Bones that make up the pelvis
Ilium
Ischium
Pubis
Scroll-like bones that project into the nasal passage
Conchae
How many cervical vertebrae do chickens have
14
How many cervical vertebrae do domestic animals & humans have (except chicken)
7