Basics of positioning: Ossification

Question 1

What ossification process are flat bones created from?

Answer 1

intramembranous ossification

Question 2

What ossification process are short, long, and irregular bones created by?

Answer 2

endochondral ossification

Question 3

When does primary ossification occur and what happens during this period of ossification?

Answer 3

it happens before birth and during this time the long central shafts of the bone begin to

Question 4

Primary ossification of a bone

Answer 4

Primary ossification begins before birth and forms long central shaft in long bones

Question 5

Secondary ossification of a bone

Answer 5

Secondary ossification occurs after birth when separate bones begin to develop at both ends of long bones

Question 6

What are the ends of a bone called? (they appear after secondary ossification)

Answer 6

epiphyses

Question 7

What are the characteristics of a long bone?

Answer 7

found only in limbs

consist of body and two enlarged articular ends

examples: Femur, humerus, phalanges

Question 8

What are the characteristics of a short bone?

Answer 8

consist mainly of cancellous bone with a thin outer layer of compact bone

Examples: carpal and tarsal bones

Question 9

What are the characteristics of flat bones?

Answer 9

consist of two plates of compact bone

middle layer of cancellous bone called diploe

examples: sternum, cranium, and scapula

Question 10

What are the characteristics of an irregular bone?

Answer 10

they are peculiarly shaped

examples: vertebrae, pelvic bones, and facial bones

Question 11

What are the characteristics of a sesamoid bone?

Answer 11

very small and oval

develop inside and beside tendons
protect the tendon from excessive wear

largest is patella (knee cap)