Facet Joints. Search. Also known as zygapophyseal or apopphyseal joint, is a synovial joint between the superior articular process of one vertebra and the inferior articular process of the vertebra directly above it. There are two facet joints in each spinal motion segment.
Generally speaking, the ectoderm differentiates to form the nervous system (spine, peripheral nerves and brain), tooth enamel and the epidermis (the outer part of integument).enerally speaking, the ectoderm differentiates to form the nervous system (spine, peripheral nerves and brain), tooth enamel and the epidermis (the outer part of integument).
Define ectoderm: the outermost of the three primary germ layers of an embryo that is the source of various tissues and structures (such as theâ¦ the outermost of the three primary germ layers of an embryo that is the source of various tissues and structures (such as the epidermis, theâ¦ See the full definition