- Male reproductive system
- Lymphatic system
- Skeletal system
- Skull
- Skeleton of trunk
- Skeleton of upper limb
- Skeleton of lower limb
- Joints
- Muscles
- Heart
- Blood vessels
- Respiratory system
- Digestive system
- Endocrine glands
- Nervous system
- Eye
- Ear
- Female reproductive system
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Cranial base
The cranial base (also known as base of the skull, or skull base, Latin: basis cranii) is the most inferior part of the skull forming the floor of the cranial cavity. The cranial base is formed by five bones: ethmoid, sphenoid, occipital, both frontal and both temporal bones.

The base of the skull can be inspected from two sides - from inside and outside. The inner aspect of the cranial base is known as the internal cranial base, and it is topographically divided further into three regions - anterior, middle and posterior cranial fossae. The outside of the cranial base is called the external cranial base.