Secondary Ossification (Quiz 3)

Question 1

Around the _____ week of gestation, primordial vertebrae develop 3 primary ossification centers. What are they?

Answer 1

8th

1) centrum
2) left neural arch
3) right neural arch

note: ossification of these centers continues throughout the fetal period

Question 2

What are the typical vertebrae in infants and adults?

Answer 2

C3-S1

Question 3

At birth, the typical vertebrae and the S1 vertebrae consist of 3 bony parts (centrum/body, and each half of neural/vertebral arch) united by _______________

Answer 3

hyaline cartilage

Question 4

At birth, the ___________ vertebrae and all ___________ vertebrae are still cartilaginous. They ossify during infancy

test q

Answer 4

inferior sacral, coccygeal

Question 5

The neural/vertebral arches begin to fuse with each other during the 1st year of life at the ________ aspect of the vertebral canal. It begins in the _______ region and proceeds up to the ________ region

Answer 5

posterior, lumbar, cervical

Question 6

The neural/vertebral arches begin fusing with the centrum during the _____ year of life. It begins in the cervical region and proceeds down to the lumbar region. It is not completed in the lower lumbar region until the _____ year

Answer 6

3rd, 6th

Question 7

The typical vertebrae have 5 secondary ossification centers that appear during puberty. Where are they?

Answer 7

-1 at the tip of SP
-1 ossification center at each TP tip (2 total)
-1 ossification center at the superior and inferior epiphyses (2 total)

Question 8

Vertebral secondary ossification centers typically fuse by what age?

Answer 8

25 y/o (this can vary, some men can grow after this but then its usually just their vertebral bodies for height)

Question 9

What is another name for anular epiphyses? What are they?

test q

Answer 9

epiphyseal growth plates
-concentric ring
-where the vertebral body grows in height
-when growth ceases, the epiphyses fuses with the vertebral body and this is now called epiphyseal rim