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Skeletal System Review
- List four functions of the skeletal system:
a.
b.
c.
d.
- Define ossification and identify the roles of the osteoblasts, osteocytes, and osteoclasts in the growth of bones.
- Describe the structural and functional features of a typical long bone.
a. periosteum
b. diaphysis
c. epiphysis
d. red marrow
e. yellow marrow
f. articular cartilage
g. endosteum
- Describe the following classes of bone and give an example of each.
a. long
b. short
c. flat
d. irregular
Skeletal System Review
- List four functions of the skeletal system:
a. Support b. Protection c. Movement Facilitation d. Mineral Storage
- Define ossification and identify the roles of the osteoblasts, osteocytes, and osteoclasts in the growth of bones. Ossification: the process by which bones form in the body by replacing pre-existing connective tissue with bone. Process occurs during bone growth. Osteoblasts: cells responsible for bone formation Osteocytes: mature bone cells Osteoclasts: cells that break down bone tissue
- Describe the structural and functional features of a typical long bone.
a. periosteum-A dense, white fibrous covering around the surface of bone. Essential for bone growth, repair, and nutrition -Serves as a point of attachment for ligaments and tendons b. diaphysis- The shaft or long, main, portion of the long bone c. epiphysis- The expanded ends of the long bone d. red marrow- Blood cell forming tissue located within the spaces or the spongy bone of the long bones. Forms all blood cells types including erythrocytes, leukocytes, and thrombocytes. e. yellow marrow- Fat storing tissues found within the medullary cavities of long bones f. articular cartilage- A thin layer of hyaline cartilage covering the epiphysis in order to reduce friction during the movement of the joint.
- Describe the following classes of bone and give an example of each.
a. long - Longer than they are wide (humerus, ulna, radius, metacarpals, phalanges, femur, tibia, fibula, metatarsals) b. short Cube-shaped, nearly equal in length and width (tarsals and carpals) c. flat Generally thin and flat, composed of two layers of compact bone on the outside with a layer of spongy bone on the inside. Provide protection and surface area for muscle attachment (cranial bones, sternum, ribs, and scapulae) d. irregular Various shaped bones (cannot be classified into any other groups or classifications). Vary in the amount of spongy and compact bone. (facial bones, vertebrae)
- Describe the following bone markings: a. foramen- An opening or hole through a bone serving as a passageway for nerves or blood vessels. b. meatus-A tube-like passageway within a bone c. sinus-A space within a bone lined with a mucus membrane to reduce the weight of the bone. d. fossa-A fairly deep pit or depression. e. condyle-A large rounded prominence which articulates with another bone. f. tuberosity-An elevated, rounded, (knob-like) usually roughened area on a bone. Is generally bigger than a tubercle and is used for muscle attachment. g. trochanter-A very large, blunt process used for muscle attachment. h. tubercle-A small rounded process used for muscle attachment. i. process-Any projection from the surface of a bone used in muscle attachment.
- Describe the terms suture and fontanel. Suture- an immovable joint found only between skull bones. Fontanel- membrane-filled spaces between crani al bones (soft spots of baby’s skull)
- Identify the major groups of bone which belong to the axial skeleton and to the appendicular skeleton.
a. axial - Consists of bones that lie along the axis of the body Skull, Vertebral column, Ribs, Sternum, Hyoid bone b. appendiculal-Contains the bones of the free appendages. Clavicle, Scapula, Humerus, Ulna, Radius, Carpals, Metacarpals, Phalanges Femur, Tibia, Fibula, Patella,Tarsals, Metatarsals, Phalanges
- Describe the location of the following skull bones: a. mandible- jaw bone b. hyoid- located in the neck between the mandible and the larynx
- List the number of vertebrae and the nicknames of the cervical vertebrae listed below: a. cervical- 7 C1: atlas C2: axis b. thoracic- 12 c. lumbar- 5 d. sacrum-5 fused e. coccyx- 2-4 fused
- Describe the structural classification of the following articulations:
a. fibrous
b. synovial
c. cartilaginous
- Describe a ligament and its role in a synovial joint.
- Describe the diseases and disorders of the skeletal system:
a. herniated disc
b. osteoarthritis
c. Osteoporosis
d. Scoliosis
e. Spina Bifida
