Anatomy - Bones, Muscles, and Joints Flashcards
Blood supply to the long bone
epiphysial (epiphysis), metaphysial (under growth plate), nutrient supply (passes in nutrient foramen, main blood supply, branches in bone), artery of bone marrow, periosteal (along bone on outside)
LOOK AT ALL DIAGRAMS IN NOTES AND NOTEBOOK
Most fibrous and cartilaginous joints are rigid and relatively immobile and are described as:
Synarthrosis
Bursa
Synovial membrane intercalated between tendon and bone
DIAGRAM
Muscle structure
Muscle fiber surrounded by endomysium
Fascia (bundle of fibers) surrounded by periomysium
Multiple fascia surrounded by epimysium
What are two forms of protection for tendon attached to bone?
Bursa (one area of tendon in danger) and synovial sheet (more of the tendon in need of protection; held there by retinaculum
More movable, usually distal attachment
Insertion
Sycondrosis
Most of cartilagenous joints
many disappear but joint between hyoid apparatus and skull is the most popular one the has not disappeared
Adduction
Movement toward the median plane
Perimysium
Surrounds a bundle of muscle fibers
Diathrosis
Most synovial joints are highly movable and described as:
Ossification centers of bones
Long bone - 1 diaphysial and 2 epiphysial centers
Short bone - one ossification center
Flat and Irregular bones - variable number of ossification centers
Connect bone to bone in order to stabilize joints and prevent unwarranted movement
Ligament
Epimysium
Surrounds entire muscle
Woven bone between the growth plate and diaphysis:
Metaphysis
Movement toward the median plane
Adduction
Rotation
Movement of a part around it’s long axis, direction of rotation is designated by the direction of movement of the cranial or dorsal surface; involves entire long axis of bone
Endomysium
Surrounds individual muscle fibers
Metaphysis
Woven bone between the growth plate and diaphysis:
Fibrous joints
Occurs where bones are united with dense connective tissue
Osteochondrisis dessicans
Caused by failure of normal cartilage formation of leaving a flap of cartilage on bone. Most commonly and shoulder, elbow, and stifle joint. It is caused by incomplete calcification.
Provide form and support to the body.Protect soft tissues.Act as levers to facilitate locomotion.Have a role in blood cell formation.Maintain mineral homeostasis.
General functions of bones:
Occurs where bones are united with dense connective tissue
Fibrous joints
For a muscle to affect a joint…
…it must pass over the joint
Movement away from the median plane
Abduction
Flat, wide, thin sheet of tissue serving as muscle attachment
Aponeurosis
Band of dense regular tissue binding down muscle tendons as they pass over bone surfaces
Retinaculum
Synarthrosis
Most fibrous and cartilaginous joints are rigid and relatively immobile and are described as:
Synovial sheet
Synovial membrane wrapped around a tendon as it passes over bone
DIAGRAM
Surrounds entire muscle
Epimysium
Insertion
More movable, usually distal attachment
Towards the leg, retinaculum becomes more like…
…tendons
Stabilizes a joint
Fixator
Circumduction
Movement of a part in a circular motion as outlining the surface of the cone but not involving entire long axis of bone
Agonist
Any muscle that produces a certain effect.
Aponeurosis
Flat, wide, thin sheet of tissue (tendon) serving as muscle attachment (runs along side muscle to help attsch to tendon
Any muscle that produces a certain effect.
Agonist
Fixator
Stabilizes a joint
Surrounds individual muscle fibers
Endomysium
Sutures
type of fibrous joint
between bones of skull
important in young but gradually ossify in older animals
Long bones, irregular bones, short bones, pneumatic bones, heterotropic or splanchic bones, flat bones, sesamoid bones
Seven classes of bones:
Two divisions of the skeleton:
Axial skeleton and appendicular skeleton
Movement of one bone in relation to another such that the angle of the joint is reduced
Flexion
The muscle which produces the opposite action to counteract the agonist.
Antagonist
What is the structure and parts of a long bone?
Structure - compact bone, medullary cavity//spongy bone (contains bone marrow), periosteum, endosteum, articular cartilage, and epiphysial cartilage (growth plate or physis)
Parts of long bone - epiphysis (contains physis), metaphysis, and diaphysis (compact bone)
DIAGRAM
Retinaculum
Band of dense regular tissue binding down muscle tendons as they pass over bone surfaces
DIAGRAM
Growth plate is made up of:
Epiphysial cartilage (hyaline cartilage)
Synergist
Support agonist action and eliminate unwanted effects.
Cartilaginous joints
Occurs where bones are united by cartilage
More fixed, least movable, usually proximal attachment
Origin
Seven classes of bones:
Long bones - femur
Irregular bones - vertebrae
short bones - digits
pneumatic bones - air filled bones - frontal bones w/ frontal sinus (all bones of chicken
heterotropic or splanchic bones - formed in soft tissue - penis
flat bones - scapula
sesamoid bones - bones w/in tendons; form synovial joints with major bones - patella
Antagonist
The muscle which produces the opposite action to counteract the agonist.
Fibrous layer of joint capsule may form thickenings that stable the joint and are called:
Collateral ligaments
Symphysis
Type of cartilagenous bone
Between 2 symmetrical halves ( ex - pelvis, mandible, etc)
Axial skeleton and appendicular skeleton
Two divisions of the skeleton:
Muscle characteristics
contractility, excitability, extensibility, and elasticity
Collateral ligaments
Fibrous layer of joint capsule may form thickenings that stable the joint and are called:
Support agonist action and eliminate unwanted effects.
Synergist
Occurs where bones are united by cartilage
Cartilaginous joints
Fleshy contractile part of muscle
Muscle belly
Structure of synovial joint
Articular cartilage, joint capsule (inner synovial membrane and outer fibrous layer), periosteum, compact bone, synovial cavity (synovia), and synovial fluid
DIAGRAM
Complex and bones are separated by fluid filled cavity
Synovial joint
Synovial joint
Complex and bones are separated by fluid filled cavity
Movement of a part in a circular motion as outlining the surface of the cone but not involving entire long axis of bone
Circumduction
Attaches bone to muscle
Tendon
Types of cartilagenous joints
syncondrosis and symphesis
Synovial membrane wrapped around a tendon as it passes over bone
Synovial sheet
Syndesmoses
Type of fibrous joint
between 2 bones (ex - radius and ulnea)
forms a ligament
Surrounds a bundle of muscle fibers
Perimysium
Joint Capsule
Attached to margins of bones forming joint
Inner synovial membrane and sometimes outer fibrous joint (to form thickenings called “collateral ligaments” to stabalize joints
Synovial fluid can be collected for diagnoses
where drugs are injected to treat joints
Caused by failure of normal cartilage formation of leaving a flap of cartilage on bone. Most commonly and shoulder, elbow, and stifle joint. It is caused by incomplete calcification.
Osteochondrisis dessicans
Most synovial joints are highly movable and descrioibed as:
Diathrosis
Tendon
Tough fibrous connective tissue that attaches bone to muscle
Similar to ligament (bone to bone) and fascia (muscle to muscle)
Collagen based
Movement of one bone in relation to another such that the angle formed by the joint is increased
Extension
Extension
Movement of one bone in relation to another such that the angle formed by the joint is increased
Muscle belly
Fleshy contractile part of muscle
Abduction
Movement away from the median plane
Epiphysial cartilage (hyaline cartilage)
Growth plate is made up of:
Bones act as ——— for muscles to create different types of motion
levers
Ligament
Connect bone to bone in order to stabilize joints and prevent unwarranted movement
Origin
More fixed, least movable, usually proximal attachment
General functions of bones:
Provide form and support to the body.Protect soft tissues.Act as levers to facilitate locomotion.Have a role in blood cell formation.Maintain mineral homeostasis.
Synovial membrane intercalated between tendon and bone
Bursa
Flexion
Movement of one bone in relation to another such that the angle of the joint is reduced
Movement of a part around it’s long axis, direction of rotation is designated by the direction of movement of the cranial or dorsal surface; involves entire long axis of bone
Rotation
3 types of fibrous joints
Sutures and syndesmoses and Gomphosis (tooth)


Fibrous and cartilagenous joints are ——- and ——- & synovial joints are ———
rigid and relatively immobile
highly movable
2 types of cartilagenous joints
Syncondrosis and symphysis
Another name for spongy bone is…
Cancellous bone
Accessory ossification centers
Anconal of the ulna
Medial coronoid process of the ulna
Caudal glenoid region of the scapula
Acetabular rim of pelvic limb
———————— = physis on immature bone
———————— = physis on mature bone
Epiphyseal plate
Epiphyseal line
What is the part of the bone under the articular cartilage?
Subchondylar Bone
The axial skeleton is made up of the…
skull
hyoid apparatus
verterbrae
ribs
sternum
Shoulder girdle = ?
Pelvic = ?
Scapula and clavicle
Ox Coxae
First and last sternebrae = ?
Palpable landmarks
How many sternebrae are there?
8
How would you desctibe the mandible symphysis?
Fibrocartilagenous
7 types of synovial joints
Plane - vertebrae
Hinge - elbow
Sadle - digits to phalanges
Elipsoidal - tardals to metatarsals
Spheroidal - ball and socket
Condylar - knee
Pivot - atlantoaxial joint
Special vertebrae
C6 - largest trasnverse processes
C7 - no more transverse foramina
T11 - Anticinal vertebrae - spinous process straight up (caudal b4 and cranial after)
Differences in diameter of ———————- causes wobbler condition in large breed dogs
Vertebral foramen
What are the parts of the intervertebral disc
Anulus fibrosus and nucleus pulpossus (inner)
Head Joints
Temporomandibular Joint - chondylar synovial joint - condylar process (mandible) with mandibular fossa (zygomatic process of temporal bone)
Mandibular Symphysis - fibrocartilagenous - two bodies of mandible
Atlanto-Occipital Joint - chondylar synovial joint - occipital condyles to cranial articular fovea of atlas (no joint)
Vertebral Joints
Atlanto-Occipital Joint - chondylar synovial joint - occipital condyles to cranial articular fovea of atlas (no joint)
Atlanto-Axial Joint - pivot synovial joint - caudal articular fovea of the atlas to the cranial articular surface of the axis (yes joint)
Dorsal Atlanto-Axial Ligament - dorsal, arch of the atlas and spine of the axis
Intervertebral Disk - anulus fibrosus + nucleus pulposus - between the bodies of the vertebrae
Dorsal Longitudinal Ligament - floor of the vertebral canal
Yellow Ligament - above the spinal cord - extend between the vertebral arches to cover the space between the articular processes
Supraspinous Ligament - connects the apices of the spinous processes from C3-T1
Nuchal Ligament - cranial continuation of the supraspinous ligament
Sacrotuberous ligament - sacrum to ishiatic tuberosity (not present in cats)
Joints of ribs to vertebrae
Head of rib to cranial and caudal costal fovea of vertebrae
Tubercle of rib to transverse processes of vertebrae
Intercapital Ligament - connect rib heads from T1-T10 = stabalizes intervertebral disks preventing intervertebral disk herniation