Fig. 1: The Skeletal System (from eMind Pig)

Name the bone indicated by #13.

Question

Fig. 1: The Skeletal System (from eMind Pig)

Name the bone indicated by #13.

BlackTom AI · Accepted Answer

To determine the correct answer, we must first consider where label #13 is located on the hind limb in the provided skeletal diagram.
Option analysis:
- Mandible: This is the lower jawbone and would be located in the head region, not near the hind limb. Its position in the diagram is far from #13, so this cannot be correct.
- Skull: The skull is the bone of the head. It is clearly not in the hind limb area where #13 appears, making this option incorrect.
- Cervical Vertebrae: These are neck bones forming part of the spine. They are not associated with the hind limb area in the image, so this choice is invalid.
- Thoracic Vertebrae: These are part of the mid-spine associated with the rib cage, again not located in the hind limb region. This option is incorrect.
- Lumbar Vertebrae: These are lower back bones, not part of the hind limb, so this is not the correct bone.
- Sacrum: A pelvic region vertebra, not in the hind limb. This option does not match the location of label #13.
- Caudal Vertebrae: Tail vertebrae, irrelevant to the hind limb diagram near the feet. This is incorrect.
- Pelvis: The pelvic ring is near the hip, not a foot bone; thus not matching #13.
- Femur: The thigh bone, which is proximal to the hip and knee, not the bone labeled at #13 location near the ankle/foot area. This is unlikely.
- Patella: The kneecap, located anteriorly in the knee region, not at the position of #13.
- Tibia: The shin bone, located along the leg above the ankle; while part of the hind limb, the label #13 in the image sits at a different distal region near the foot, not on the tibia.
- Fibula: The thinner bone of the lower leg, parallel to the tibia; again, not in the exact position of #13.
- Tarsals: This label corresponds to the ankle bones in the foot region. On many skeletal diagrams, the tarsals form a cluster near the ankle, and a single tarsal bone would be shown around the ankle-foot junction, which aligns with the position of #13 in this image.
- Metatarsals: The bones of the midfoot, located between the tarsals and the phalanges. These would be more proximal to the toes and may be labeled further along the midfoot, not precisely at the ankle region where #13 sits.
- Phalanges: The toe bones, located at the far end of the foot. The label #13 is not on the terminal toe bones themselves.
- Ribs: These are thoracic cage bones, unrelated to the hind limb in this diagram.
- Sternum: The breastbone of the chest, not involved with the hind limb.
- Scapula: The shoulder blade, part of the forelimb girdle, not relevant to the hind limb labeling.
- Humerus: The upper arm bone, part of the forelimb, not relevant here.
- Radius: Forearm bone, not related to the hind limb.
- Ulna: Forearm bone, not related to the hind limb.
- Carpals: Wrist bones in the forelimb, not relevant to the hind limb.
- Metacarpals: Hand bones in the forelimb, not relevant to the hind limb.

Conclusion: Among the options, the bone type that best matches the location of label #13 at the ankle/foot region is Tarsals, the ankle bones. This makes 'Tarsals' the most appropriate choice.

Fig. 1: The Skeletal System (from eMind Pig) Name the bone indicated by #13.单项选择题

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