Musculoskeletal Structure Flashcards
Form of connective tissue, one of the hardiest tissues in the body.
Bone
Bone
Form of connective tissue, one of the hardiest tissues in the body.
Ossification
The formation of bone from fibrous tissue, continues until maturity
The formation of bone from fibrous tissue, continues until maturity
Ossification
Osteoblasts
Oste/o = bone, -blasts= immature
Immature bone cells that produce bony tissue
Immature bone cells that produce bony tissue
Osteoblasts
Oste/o = bone, -blasts= immature
Osteoclasts
Phagocytic cells that eat away bony tissue from the medullary cavity if log bone
Phagocytic cells that eat away bony tissue from the medullary cavity of long bone
Osteoclasts
Oste/o = bone, -class = break
Osteocytes
Mature osteoblasts
Mature osteoblasts
Osteocytes
Hematopoietic
Producing red blood cells (such as red bone marrow)
Producing red blood cells
Hematopoietic
Hemat/o = blood, -poietic= pertaining to formation
Medullary cavity
Inner space
Of the long bone it contains yellow bone marrow
Inner space
Medullary cavity
Cartilage
A form of connective tissue more elastic than bone
A form of connective tissue more elastic than bone
Cartilage
Articular cartilage
Cartilage that covers the joint surfaces of bones
Cartilage that covers the joint surfaces of bones
Articular cartilage
Meniscus
Curved fibrous cartilage found in some joints and cushions forces applied to the joint
Curved fibrous cartilage found in some joints and cushions forces applied to the joint
Meniscus
Cortical bone
Hard, dense, strong bone that forms the outer layer of bone; also called compact bone
Cortex= bark or shell in Latin
Hard, dense, strong bone that forms the outer layer of bone
Cortical or compact bone
Cancellous bone
Lighter, less strong bone that is found in the ends and inner portions of long bones; also called spongy bone
Cancellous= latticework in Latin
Lighter, less strong bone that is found in the ends and inner portions of long bones
Cancellous or spongy bone
Epiphysis
Eh-pihf-ih-sihs
Wide end of a long bone, which is covered with articular cartilage and is composed of cancellous bone
Wide end of a long bone, which is covered with articular cartilage and is composed of cancellous bone
Epiphysis
Diaphysis
Shaft of a long bone that is composed mainly of compact bone
Shaft of a long bone that is composed mainly of compact bone
Diaphysis
Physis
Cartilage segment of long bone that involves growth of the bone; also called growth plate or epiphyseal cartilage
Cartilage segment of long bone that involves growth of the bone
Physis, aka growth plate or epiphyseal cartilage
Metaphysis
Wider part of long bone shaft located adjacent to the physis; in adult animals, it is considered part of the epiphysis
Wider part of long bone shaft located adjacent to the physis; in adult animals, it is considered part of the epiphysis
Metaphysis
Periosteum
Tough, fibrous tissue that forms the outer covering of bone
Tough, fibrous tissue that forms the outer covering of bone
Periosteum
Endosteum
Tough, fibrous tissue that forms the lining of the medullary cavity
Tough, fibrous tissue that forms the lining of the medullary cavity
Endosteum
Long bones
Bones consisting of a shaft, two ends, and a marrow cavity (ie, a femur)
Bones consisting of a shaft, two ends, and a marrow cavity
Long bones
Short bones
Cube-shaped bones with no marrow cavity (ie, carpal bones)
Cube-shaped bones with no marrow cavity
Short bones
Flat bones
Thin, flat bones (ie, pelvis)
Thin, flat bones
Flat bones
Pneumatic bones
Sinus-containing bones (ie, frontal bones)
Sinus-containing bones
Pneumatic bones
Irregular bones
Unpaired bones (ie, vertebrae)
Unpaired bones
Irregular bones
Sesamoid bones
Small bones embedded in tendon (ie, patella) the only exception is the distal sesamoid of the horse
Small bones embedded in tendon
Sesamoid bones
Joints or articulations
Connections between bones
Articulate means to join in a way that allows motion between parts
Connections between bones
Joints or articulations
Synarthroses
Joints that allow no movement. Usually united with fibrous connective tissue
Ex: sutures
Joints that allow no movement
Synarthroses
Amphiarthroses
Joints that allow slight movement
Ex: pelvis halves
Joints that allow slight movement
Amphiarthroses
Diarthroses
Joints that allow free movement
Joints that allow free movement
Diarthroses
Suture
A jagged line where bones join and form a non moveable joint (synarthroses) typically found in the skull
A jagged line where bones join and form a non moveable joint, usually found in the skull
Suture
Fontanelle
Soft spot remaining at the junction of sutures that usually closes after birth
Soft spot remaining at the junction of sutures that usually closes after birth
Fontanelle
Symphysis
Joint where two bones join and are held firmly together so that the function as one bone. Also called cartilaginous joints.
Mandibular symphysis or pubic symphysis, for example.
Joint where two bones join and are held firmly together so that the function as one bone.
Symphysis or cartilaginous joint
Synovial joint
Ball-and-socket joints. Aka, enarthrosis, spheroid joints.
Allow a wide range of movement in many directions.
Ex: hip and shoulder joints
Joints that allow a wide range of movement in many directions (4 possible answers)
Synovial joints. Ball-and-socket joints. Aka, enarthrosis or spheroid joints
Arthrodial or condyloid joints
Joints with oval projections that fit into a socket, suck as the carpal joints.
Joints with oval projections that fit into a socket, suck as the carpal joints.
Arthrodial or condyloid joints
Trochoid joints
Pulley-shaped joints. Ex: the connection between the atlas to the axis
Pulley-shaped joints
Trochoid joints
Hinge joints
Allow motion in one plane or direction
Ex: canine stifle or the elbow
Allow motion in one plane or direction
Hinge joints
Gliding joints
Move or glide over each other
Ex: radioulnar joint or between vertebrae
Joints that move or glide over each other
Gliding joints
Saddle joint
Only found in primates. Creates the opposable thumb: allows the thumb to flex, extend, abduct, circumduct.
Joint found only in the carpometacarpal joint in the thumb of primates
Saddle joint
Ligament
A band of fibrous connective tissue that connects one bone to another bone to help stabilize joints
A band of fibrous connective tissue that connects one bone to another bone to help stabilize joints
Ligament
Tendon
A band of fibrous connective tissue that connects muscle to bone to help the animal move
A band of fibrous connective tissue that connects muscle to bone to help the animal move
Tendon
Bursa
A fibrous sac that acts as a cushion to ease movement in areas of friction
A fibrous sac that acts as a cushion to ease movement in areas of friction
Bursa
Synovial membrane
Inner lining of the bursa and synovial joints that secretes synovial fluid
Inner lining of the bursa and synovial joints that secretes synovial fluid
Synovial membrane
Synovial fluid
Acts as a lubricant to make joint movement smooth
Acts as a lubricant to make joint movement smooth
Synovial fluid
Axial skeleton
The framework of the body that includes the skull, auditory ossicles, hyoid bones, vertebral column, ribs, and sternum
The framework of the body that includes the skull, auditory ossicles, hyoid bones, vertebral column, ribs, and sternum
Axial skeleton
Appendicular skeleton
Framework of the body that consists of the extremities, shoulders, pelvic girdle
Framework of the body that consists of the extremities, shoulders, pelvic girdle
Appendicular skeleton
Cranium
Portion of the skull that encloses the brain
Portion of the skull that encloses the brain
Cranium
Frontal bone
Forms the roof of the cranial cavity or front or cranial portion of the skull.
In some species the horn or cornual process arises from the frontal bone.
Forms the roof of the cranial cavity or front or cranial portion of the skull.
Frontal bone
Parietal bone
Paired bones that form the roof of the caudal cranial cavity
Paired bones that form the roof of the caudal cranial cavity
Parietal bones
Occipital bones
Forms the caudal aspect of the cranial cavity where the foramen magnum is located
Forms the caudal aspect of the cranial cavity where the foramen magnum is located
Occipital bones
Foramen and Magnum
Together…?
Foramen: opening in bone through which tissue passes
Magnum: large
Foramen Magnum: opening for the spinal cord in the cranium
opening for the spinal cord in the cranium
Foramen Magnum
Temporal bones
Paired bones that form the sides and base of the cranium
Paired bones that form the sides and base of the cranium
Temporal bones
Sphenoid bones
Paired bones that form part of the base of the skull and parts of the floor and sides of bony eye sockets
Paired bones that form part of the base of the skull and parts of the floor and sides of bony eye sockets
Sphenoid bones
Ethmoid bones
Forms the rostral part of the cranial cavity
Forms the rostral part of the cranial cavity
Ethmoid bones
Incisive bones
Forms the rostral part of the hard palate and lower edges of the nares
Forms the rostral part of the hard palate and lower edges of the nares
Incisive bones
Pterygoid bones
Forms the lateral wall of the nasopharynx
Forms the lateral wall of the nasopharynx
Pterygoid bones
Sinuses
Air or fluid filled spaces in the skull
Air or fluid filled spaces in the skull
Sinuses
Brachycephalic
Dogs have short, wide heads like pugs or Pekingese
Dogs have short, wide heads like pugs or Pekingese
Brachycephalic
Dolicephalic
Dogs have narrow, long heads like collies or greyhounds
Dogs have narrow, long heads like collies or greyhounds
Dolicephalic
Mesocephalic
Dogs have average width heads like labs. Also called mesaticephalic
Dogs have average width heads like labs
Mesocephalic or mesaticephalic
Zygomatic bones
Forms the orbit and cheekbones, projections from the temporal and zygomatic bone form he zygomatic arch
Forms the orbit and cheekbones
Zygomatic bones
Palatine bones
Forms part of the hard palate
Forms part of the hard palate
Palatine bones
Lacrimal bones
Forms the medial part of the orbit
Forms the medial part of the orbit
Lacrimal bones
Nasal bones
Forms the bridge of the nose
Forms the bridge of the nose
Nasal bones
Vomer bones
Forms the base of the nasal septum
Forms the base of the nasal septum
Vomer bones
Nasal septum
The cartilaginous structure that divides the two nasal cavities
The cartilaginous structure that divides the two nasal cavities
Nasal septum
Hyoid bones
Bone suspended between the mandible and laryngopharynx
Bone suspended between the mandible and laryngopharynx
Hyoid bone
Vertebral column
Spinal Column or backbone, supports the head and body and protects the spinal cord. Consists of individual bones called vertebra.
supports the head and body and protects the spinal cord
Vertebral column. Spinal column or backbone
Vertebral body
The solid portion of the vertebra ventral to the spinal cord
The solid portion of the vertebra ventral to the spinal cord
Vertebral body
Vertebral arch
The dorsal part of the vertebra that surrounds there spinal cord
The dorsal part of the vertebra that surrounds there spinal cord
Vertebral arch
Lamina (vertebra)
The left or right dorsal half of the arch
The left or right dorsal half of the arch
Lamina
Spinous process
A single process (projection) from the dorsal part of the vertebral arch
A single process (projection) from the dorsal part of the vertebral arch
Spinous process
Transverse process
Project laterally from the right and left sides of the vertebral arch
Project laterally from the right and left sides of the vertebral arch
Transverse process
Articular processes
Paired cranial and caudal projections located on the dorsum of the vertebral arch
Paired cranial and caudal projections located on the dorsum of the vertebral arch
Articular processes
Vertebral foramen
The opening in the middle of the vertebra through which the spinal cord passes
The opening in the middle of the vertebra through which the spinal cord passes
Vertebral Foramen
Intervertebral discs
Cartilage discs that separate and cushion the vertebra from each other
Cartilage discs that separate and cushion the vertebra from each other
Intervertebral discs
Atlas
C1, cervical vertebra one
C1, cervical vertebra one
Atlas
Axis
C2, cervical vertebra two
C2, cervical vertebra two
Axis
Cervical vertebrae
Neck area C vertebrae
Neck area, C vertebrae
Cervical vertebrae
Thoracic vertebrae
Chest area, T vertebrae
Chest area, T vertebrae
Thoracic vertebrae
Lumbar vertebrae
Loin area, L vertebrae
Loin area, L vertebrae
Lumbar vertebrae
Sacral vertebrae
Sacrum area, S vertebrae
Sacrum area, S vertebrae
Sacral vertebrae
Coccygeal vertebrae
Tail area, Cy or Cd vertebrae. Also called caudal.
Tail area, Cy or Cd vertebrae.
Coccygeal or caudal vertebrae
Ribs
Paired bones that attach to thoracic vertebrae. Also called costals
Paired bones that attach to thoracic vertebrae
Ribs or costals
Sternum
Breastbone. Forms the midline ventral portion of the rib cage, divided into three parts.
Forms the midline ventral portion of the rib cage, divided into three parts.
Sternum, breastbone
Manubrium
The cranial portion of the sternum
The cranial portion of the sternum
Manubrium
The body
The middle portion of the sternum
The middle portion of the sternum
Body
Xiphoid process
The caudal portion of the sternum
The caudal portion of the sternum
Xiphoid process
Thoracic cavity
Rib cage. Protects the heart and lungs. Boundaries are the ribs, sternum, and thoracic vertebrae
Protects the heart and lungs. Boundaries are the ribs, sternum, and thoracic vertebrae. Rib cage.
Thoracic cavity or rib cage
The bones of the front limb (8 names)
Scapula, clavicle, humerus, radius, ulna, carpus, metacarpals, phalanges
Scapula
Shoulder blade. A large triangular bone on the side of the thorax
A large triangular bone on the side of the thorax
Scapula. Shoulder blade.
Clavicle
Collar bone. Slender bone that connects the sternum to the scapula
Swine, ruminants, and equine do not have clavicles
Slender bone that connects the sternum to the scapula
Clavicle. Collar bone.
Humerus
The long bone of the proximal front limb. Sometimes called the brachium.
The long bone of the proximal front limb. Sometimes called the brachium.
Humerus
Radius
Cranial bone of the front limb in the antebrachium.
Cranial bone of the front limb in the antebrachium.
Radius
Ulna
Caudal bone of the front limb in the antebrachium.
Caudal bone of the front limb in the antebrachium.
Ulna
Olecranon
A proximal projection on the ulna that forms the elbow point
A proximal projection on the ulna that forms the elbow point
Olecranon