sacrum

Question 1

1) Ala

Answer 1

• a large triangular articular surface on the sides of the sacral base; continuous with iliac fossa

Question 2

2) Sacral promontory

Answer 2

• the anterior margin of the body of the first sacral vertebra, forming the prominent sacrovertebral angle when articulated with the last lumbar vertebra

Question 3

3) Median Sacral Crest

Answer 3

• a bumpy ridge on the posterior midline of the sacrum; formed by fused spinous processes

Question 4

4) Sacral Canal

Answer 4

• bony tunnel; passes through the sacrum and terminates at the sacral hiatus near the inferior tip of the sacrum

Question 5

5) Anterior Sacral Foramina

Answer 5

• openings on the anterior concave surface of the sacrum; place of exit for the spinal nerves

Question 6

6) Posterior Sacral Foramina

Answer 6

• openings on the posterior convex surface of the sacrum; place of exit for the spinal nerves