Opening for blood vessels and nerves Shallow cavity in or on a bone Narrow, deep, slit-like opening Hollow cavity within a bone Question 86 The human body has 12 pairs of what bones? tarsals vertebrae phalanges ribs

* **Opening for blood vessels and nerves:** Foramen (plural: foramina)<br />* **Shallow cavity in or on a bone:** Fossa (plural: fossae)<br />* **Narrow, deep, slit-like opening:** Fissure<br />* **Hollow cavity within a bone:** Sinus<br /><br />**Question 86:**<br /><br />The human body has 12 pairs of **ribs**.<br />