Skeletal System Flashcards
Number of bones in an human adult skeleton
206 bones
Number of bones in an human infant skeleton
300 bones
Functions of the Skeletal System (5)
Framework, storage, movement, protection, Blood Cell Production
Main mineral stored in bones.
Calcium
Another term for Blood Cell Production
Hematopoiesis
Coats the end of bones where they meet to form a joint
Cartilage
Attaches muscle to bone
Tendons
Connects bones to each other; holds joints in place
Ligaments
Gives ability to move
Joints
Classification of bones. (4)
Long, short, irregular, flat
Longer length than width
Long bone
Length is equal to width
Short bone
Protects fragile organs
Flat bone
Has no uniformed shape
Irregular bone
Classification of bone tissue (4)
Compact bone, spongy bone, osteocytes, bone marrow
Forms hard exterior of bone
Compact bone
Porous bone that is for support and flexibility
Spongy bone
Where new cells are produced
Bone marrow
Makes up the bone tissue
Osteocytes
Parts of skeleton. (2)
Axial and Appendicular Skeleton
Forms longitudinal axis of body
Axial Skeleton
Bones of the limbs and girdles
Appendicular Skeleton
composed of collagen and calcium phosphate; living growing tissue; makes up only 20% of body weight because it is lightweight
Bones
Provides soft framework
Collagen
Strengthens and hardens framework
Calcium Phosphate
Membrane the covers the surface of bone that contains network of blood vessels that supplies nutrients
Periosteum
Network that carries nourishment to the living bone tissue
Haversian Canal
found in most bone; can be converted into red bone marrow
Yellow Bone Marrow
material at the epiphyseal ends of the long bones
Red Bone Marrow
Made of spongy bone; found in the ends of bones
Epiphyses
Made of compact bone; found in the middle part of bones
Diaphysis
Cushions the joint
Articular Cartilage
Types of joints (3)
Fixed joint, semi-movable joint, movable joint
Joint that prevents bone movements
Fixed joint
Joint that allows limited movement
Semi-movable joint
Joint that supports movement
Movable joint
For lubrication
Synovial Fluid
Immune system defect
Arthritis Rheumatoid
Weakens bones
Osteoarthritis
Lack of calcium which causes fragile bones
Osteoporosis
Contains bone marrow
Medullary Cavity
Number of bones in hand
27 bones
Lower leg bone that gets all the weight; thicker
Tibia
Lower leg bone that gets no weight; thinner
Fibula
Hardest part of the skull
Cranial
Part of skull that forms the face
Facial
3 smallest bones found in the auditory ossicles
Malleus, stapes, incus
Smallest bone
Stapes
Only movable joint in the skull
Mandible
Collar bone
Clavicle
Shoulder Blade
Scapula
Number of vertebarae
33 vertebra
Protects spinal cord
Vertebral column
Breast bone
Sternum
Ribs that are not attached to the sternum
Floating ribs
Protects urinary, reproductive and digestive system
Pelvic Girdle
Upper arm
Humerus
Thicker part of the lower arm
Radius
Thinner part of the lower arm
Ulna
Wrist bones
Carpals
Palm bones
Metacarpals
Fingers and toes
Phalanges
Ankle bones
Tarsals
Sole bones
Metatarsals
Knee bones
Patella