click below
click below
Normal Size Small Size show me how
Skeletal System
Skeletal System Quiz 3
Question | Answer |
---|---|
Number of bones in the human body | 206 |
Funtions of Skeletal System | Support, Protection, Movement, Storage, Erathropoiesis |
Structure of Bones - Bones are made of | Collagen, Osteocytes, Salts |
form of connective tissue made up of cells, fibres, and other extracellular material | Bones |
Mature Bone Cells, found of surface of bone | Osteocytes |
Immature Bone Cells | Osteoblasts |
67% of Bone Weight is made up of | Mineral Salts |
Most abundant Mineral Salts | Calcium Phosphate, Calcium Carbonate |
Least Abundant Mineral Salts | Magnesium Hydroxide, Flouride & Sulfate |
Bodys most abundant protein found in bone matrix | Collagen |
fills in spaces of matrix, collagent then embeds and is then crystalized and harden to make bones | Mineral Salts |
means porus, britle, plyable | Decalcified |
Communication system of the bone or tree rings | Haversian System |
consists of a matrix arranged in circles with a central canal | Haversian System |
Funtion includes allowing nourishment into osteocytes and waste removal | Haversian System |
smaller canals that provides for communication with osteocytes and haversian canal and radiate from the lucunae | Canaculli |
provides roots for tissue fluids to reach blood cells | Canaculli |
Canals from periostium, into haversion canal | Volkmanns Canals |
How many arteries supply bone marrow to each bone | 1 |
marrow cavity is know as | medeullary |
rings of the Haversian System are called | lamella |
located between the lammella are | Lucunae |
Actual spaces between the lamella and lucanae are occupied by | osteocytes |
Joint Movements: angle at joint decreases, ex bending head forward | Flexion |
Joint Movements: return from flexion | extension |
Joint Movements: moving the part away from the midline of the body ex. moving arms out to the sides | abduction |
Joint Movements: moving the part toward the midline of the body, ex arms back at side | adduction |
Joint Movements: pivoting bone upon its axis, ex turning head side to side | Rotation |
Joint Movements: making a circular motion | Circumduction |
Joint Movements: further extension of straightening the joint to an angle greater than 180 degrees, ex bending head back as far as possible | Hyperextension |
Joint Movements: flexing the ankle | Dorsiflexion |
Joint Movements: extending the ankle | Plantar flexion |
movement of forarm turning the palm forward | Supination |
movement of forearm turning the back of the hand forward | Pronation |
ankle movement turning the sole of the foot forward | Inversion |
ankle movement turning the sole of foot outward | eversion |
moving a part forward | protraction |
pulling a part back | retraction |