Examples from literature

• It is formed from two centres, each of which is originally a ring round the carotid foramen. 
• It is remarkable that neither of these observers should have noticed the foramen in the testa. 
• The nerve trunks make their way out of the spinal canal through apertures between the vertebra, called the inter-vertebral foramina and then divide into numerous branches, their ramifications extending principally to the muscles and the skin. 
• The next three pairs of nerves all arise from the medulla, and escape from the cavity of the skull through the same foramen. 
• The teeth are smaller, and the infra-orbital foramen much larger.