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Skeletal System: Unit Review and Quiz
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Unit Review
Here is what we have learned from this unit:
- The human skeleton is well adapted for the functions it
must perform. Functions of bones include support, protection,
movement, mineral storage, and formation of blood cells.
- There are two types of bone tissue: compact and spongy.
Compact bone consists of closely packed osteons, or haversian
system. Spongy bone consists of plates of bone, called trabeculae,
around irregular spaces that contain red bone marrow.
- Osteogenesis is the process of bone formation. Three types
of cells, osteoblasts, osteocytes, and osteoclasts, are
involved in bone formation and remodeling.
- In intramembranous ossification, connective tissue membranes
are replaced by bone. This process occurs in the flat bones
of the skull. In endochondral ossification, bone tissue
replaces hyaline cartilage models. Most bones are formed
in this manner.
- Bones grow in length at the epiphyseal plate between the
diaphysis and the epiphysis. When the epiphyseal plate completely
ossifies, bones no longer increase in length.
- Bones may be classified as long, short, flat, or irregular.
The diaphysis of a long bone is the central shaft. There
is an epiphysis at each end of the diaphysis.
- The adult human skeleton usually consists of 206 named
bones and these bones can be grouped in two divisions: axial
skeleton and appendicular skeleton.
- The bones of the skeleton are grouped in two divisions:
axial skeleton and appendicular skeleton.
- There are three types of joints in terms of the amount
of movement they allow: synarthroses (immovable), amphiarthroses
(slightly movable), and diarthroses (freely movable).
Quiz
To test how much you have learned from this unit, two types
of quizzes have been created. The first type is a true-false
quiz. The quiz questions are grouped into several sets of
two questions each to reduce the size of the content on each
page. When you finish the questions in one set, click the
Next button (a right-pointing arrow icon located in the Title
Bar) to proceed to the next page.
The second type is a drag-and-drop quiz, in which, by using
the mouse pointer, you drag a textual or graphic element
to a target area to show your knowledge of the material
covered in the unit. Note that the object you are dragging
will snap back to its original position until it is placed
in the correct target area. Try to drag the object as close
to the center of the target area as possible so that the
object will snap to the target area when you chose a correct
answer.
Please click here to
take the true-false quiz.
Please click here to
take the drag-and-drop quiz.
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