Question

matching 1.5 points
sacrum
21
22
23
24
25
26
21
22
23
24
25
26
anterior sacral foramen
coccyx
transverse lines of fusion
median sacral crest
body
posterior sacral foramen

Explanation:

Identify anatomical views

The image displays two views of the human sacrum and coccyx. The left image shows the posterior (dorsal) surface, characterized by the rough median sacral crest and posterior sacral foramina. The right image shows the anterior (pelvic) surface, characterized by a smoother surface, transverse lines of fusion, and anterior sacral foramina.

Analyze posterior landmarks

Using Vertebral Anatomy and Anatomical Landmarks:

• 21 points to the broad, flat lateral region on the superior part of the sacrum, known as the ala (or wing) of the sacrum. Looking at the options, "Body" is listed. The pointer 21 is directed near the base/superior articular process or body region of the sacrum. Let's re-examine the options: "Anterior sacral foramen", "Coccyx", "Transverse lines of fusion", "Median sacral crest", "Body", "Posterior sacral foramen". 21 points to the superior base/body area of the sacrum.
• 22 points to the central ridge on the posterior surface, which is the Median sacral crest.
• 24 points to the openings on the posterior side, which are the Posterior sacral foramen (plural: foramina).
• 26 points to the terminal tailbone structure attached to the apex of the sacrum, which is the Coccyx.

Analyze anterior landmarks

Using Vertebral Anatomy and Anatomical Landmarks:

• 23 points to the horizontal ridges where the sacral vertebrae fused together, which are the Transverse lines of fusion.
• 25 points to the openings on the smooth anterior (pelvic) surface, which are the Anterior sacral foramen (plural: foramina).

Match numbers to options

Let's verify each match:

• 21: Body (superior region/base of the sacrum)
• 22: Median sacral crest
• 23: Transverse lines of fusion
• 24: Posterior sacral foramen
• 25: Anterior sacral foramen
• 26: Coccyx

Answer:

Question 21

Body

Question 22

Median sacral crest

Question 23

Transverse lines of fusion

Question 24

Posterior sacral foramen

Question 25

Anterior sacral foramen

Question 26

Coccyx