Bones of the skull quiz diagram online, bones of the skull worksheet, label the human skull. This is a blank diagram of the skull and students will have to complete the diagram with the following labels: mandible, frontal, ethmoid, nasal, sphenoid, lacrimal, zygomatic, maxila, occipital, parietal. The human skull as seen is a collection of different small bones fitted together as a puzzle. The skull generally protects the brain from injury. This is so because unlike the brain, it is constituted of strong bones. This is an interactive anatomy diagram and there is no limit to the number of times students can try out this exercise. Get more offline practice with the worksheet above. | Multiple choice quiz featuring biology test questions for students to review biology topics. Click on each question and select the correct answer below and submit. Feedback is instant and at the end you will get your score. Biology quiz for 2nd, 3rd, 4th, 5th, 6th, 7th grades to review. Focus: Online science Trivia | science quiz questions | Biology Test | Biology questions.