click below
click below
Normal Size Small Size show me how
Meat&Bones-Skeletal
VETT 118 Romich Text Chapter 3 Vet Med Terms
| Term | Definition |
|---|---|
| Ossification | The formation of bone from fibrous tissue. |
| Osteoblasts | Immature bone cells that produce bony tissue. |
| Osteoclasts | Phagocytic cells that eat away bony tissue from the medullary cavity of long bone. |
| Osteocytes | Mature osteoblasts. |
| Hematopoietic | Red bone marrow is this, meaning that it forms RBC's, WBC's, and clotting cells. |
| Medullary cavity | Inner space of bone, containing yellow marrow. |
| Cartilage | Connective tissue that is more elastic than bone. |
| Articular cartilage | Covers the joint surfaces of bone. |
| Meniscus | A curved fibrous cartilage found in some joints that cushions forces applied to that joint. |
| Articulations | Joints. Connections between bones. |
| Synarthroses | Immovable joints. |
| Amphiarthroses | Semimovable joints. |
| Diarthroses | Freely movable joints. |
| Suture | A type of synarthrosis. A jagged line where bones join and form a nonmovable joint. (In the skull.) |
| Fontanelle | Soft spot remaining at the junction of sutures that usually closes after birth. |
| Symphysis | A type of amphiarthrosis. A joint where two bones join and are held firmly together so that they function as one bone. AKA cartilagious joint. |
| Synovial joints | Classified as ball-and-socket joints (enarthrosis or spherioid joints), condyloid joints, trochoid or pivot joints, ginglymus or hinge joints, and gliding joints. |
| Cortical bone | Hard, dense, strong bone that forms the outer layer of bone. AKA compact bone. |
| Cancellous bone | Lighter, less strong bone that is found in the ends and inner portions of long bones. AKA spongy bone. |
| Epiphysis | Wide end of a long bone, composed of cancellous bone and covered with articular cartilage. |
| Diaphysis | Shaft of a long bone, composed mainly of compact bone. |
| Physis | Cartilage segment of lone bone that involves growth of the bone. AKA growth plate or epiphyseal cartilage. |
| Metaphysis | Wider part of long bone shaft located adjacent to the physis. Considered part of epiphysis in adults. |
| Periosteum | Tough, fibrous tissue that forms the outer covering of bone. |
| Endosteum | Tough, fibrous tissue that forms the lining of the medullary cavity. |
| Long bones | Bones consisting of a shaft, two ends, and a marrow cavity. |
| Short bones | Cube shaped bones with no marrow cavity. |
| Flat bones | Thin, flat bones. |
| Pneumatic bones | Sinus-containing bones. |
| Irregular bones | Unpaired bones. |
| Sesamoid bones | Small bones embedded in a tendon. |
| Ball-and-socket joints | Allow a wide range of motion in many directions. |
| Arthrodial or condyloid joints | Joints with oval projections that fit into a socket. |
| Trochoid joints | Pulley-shaped joints. |
| Hinge joints | Allow motion in one plane or direction. |
| Gliding joints | Joints that move or glide over each other. |
| Saddle joint | Allows primates to flex, extend, abduct, adduct, and circumduct the thumb. |
| Ligament | A band of fibrous connective tissue that connects one bone to another to help stabilize joints. |
| Tendon | A band of fibrous connective tissue that connects muscle to bone to help the animal move. |
| Bursa | A fibrous sac that acts as a cushion to ease movement in areas of friction. |
| Synovial membrane | Inner lining of bursae and synovial joints which secretes synovial fluid as a lubricant to make joint movement smooth. |
| Axial skeleton | The framework of the body. Includes skull, auditory ossicles, hyoid bones, vertebral column, ribs, and sternum. |
| Appendicular skeleton | The framework of the body that consists of the extremeties, shoulder, and pelvic girdles. (Appendages.) |
| Cranium | The portion of the skull that encloses the brain. |
| Frontal | Forms the roof of the cranial cavity, or "front" or cranial portion of the skull. |
| Parietal | Paired bones that form the roof of the caudal cranial cavity. |
| Occipital | Forms the caudal aspect of the cranial cavity where the foramen magnum (opening of the spinal cord) is located. |
| Temporal | Paired bones that form the sides and base of the cranium. |
| Sphenoid | Paired bones that form part of the base of the skull and parts of the floor and sides of the bony eye socket. |
| Ethmoid | Forms the rostral part of the cranial cavity. |
| Incisive | Forms the rostral part of the hard palate and lower edges of nares. |
| Pterygoid | Forms the lateral wall of the nasopharynx. |
| Sinuses | Air or fluid filled spaces in the skull. |
| Zygomatic | The orbit and cheekbone. |
| Maxilla | Upper jaw. |
| Mandible | Lower jaw. |
| Palatine | Part of the hard palate. |
| Lacrimal | Medial part of the orbit. |
| Incisive | Rostral part of the hard palate and lower edge of nares. |
| Nasal | Bridge of the nose. |
| Vomer | Base of the nasal septum (cartilanogous structure that divides the two nasal cavities). |
| Hyoid | Bone suspended between the mandible and the laryngopharynx. |
| Cervical region (vertebral) | Neck area. "C" |
| Thoracic region (vertebral) | Chest area. "T" |
| Lumbar region (vertebral) | Loin area. "L" |
| Sacral region (vertebral) | Sacrum area. "S" |
| Coccygeal/caudal region (vertebral) | Tail area. "Cy" or "Cd" |
| Vertebral foramen | Opening in the middle of the vertebra where the spinal cord passes through. |
| Intervertebral discs | Cartilage discs that separate and cushion vertebrae. |
| Body of vertebra | Solid portion ventral to the spinal cord. |
| Arch of vertebra | Dorsal part that surrounds the spinal cord. |
| Lamina of vertebra | Left or right dorsal half of the arch. |
| Spinous process | A single projection from the dorsal part of the vertebral arch. |
| Articular processes | Paired cranial and caudal projections on the dorsum of the vertebral arch. |
| Atlas | "C1" Cervical vertebra one. |
| Axis | "C2" Cervical vertebra two. |
| Costals | Ribs. Paired bones that attach to thoracic vertebrae. |
| Sternum | Breastbone. Forms the midline ventral portion of the rib cage. Divided into 3 parts- manubrium, body, and xyphoid process. |
| Manubrium | The cranial portion of the sternum. |
| Body (sternum) | The middle portion of the sternum. |
| Xyphoid process | The caudal portion of the sternum. |
| Thoracic cavity | Rib cage. |
| Scapula | Shoulder blade. |
| Clavicle | Collar bone. |
| Humerus | The long bone of the proximal front limb. Sometimes called brachium. |
| Antebrachium | Region of the forearm of the radius and ulna. |
| Radius | Cranial bone of the front limb. |
| Ulna | Caudal bone of the front limb. |
| Olecranon | Proximal projection of the ulna that forms the point of the elbow. |
| Carpal bones | Irregularly shaped bones, the wrist in humans. In small animals it's the carpus. In large, it's the knee. |
| Metacarpals | Bones found distal to the carpus. |
| Splint bones | Metacarpals and metatarsals II and IV (in horses) which do not articulate with the phalanges. |
| Cannon bone | The large third metacarpal or metatarsal bone, which is attached to the splint bones by an interosseous ligament. |
| Phalanges | Bones of the digits. One is a phalanx. |
| Digits | (Like fingers) |
| Dewclaw | Digit I of dogs. In cloven-hoofed animals it's called a vestigial digit. |
| Claw | Phalanx 3 (P3) in non-hooved animals. |
| Sesamoid bones | Small nodular bones embedded in a tendon or joint capsule. |
| Pelvis | Hip. Consists of three pairs of bones- ilium, ischium, and pubis. |
| Ilium | Largest pair of bones in the pelvis, blade-shaped. |
| Ischium | Caudal pair of bones in the pelvis. |
| Pubis | Ventral pair of bones that are fused on midline by a cartilaginous joint called the pubis symphysis. |
| Acetabulum | Large socket of the pelvic bone, where the three bones meet. Forms the ball-and-socket joint with the femur. |
| Femur | Thigh bone. |
| Patella | Large sesamoid bone in the rear limb. The kneecap in people. |
| Stifle joint | Joint that houses the patella. Knee in humans. |
| Tibia | Larger and more weight-bearing bone of the two distal long bones in the rear limb. |
| Fibula | Long, slender bone (smaller of the two) in the rear limb. |
| Tarsus/Hock | Irregularly shaped bones in the ankle area of people. Tarsus-small animals. Hock-large animals. |