notochord
(Science: embryology) An axial mesodermal tissue found in embryonic stages of all chordates and protochordates, often regressing as maturity is approached. Typically a rod shaped mass of vacuolated cells. It lies immediately below the nerve cord and may provide mechanical strength to the embryo.
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Neurons generate electric signals that they pass along to the other neurons or target tissues. In this tutorial, you wil..
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Meet some of New Zealand's unique fauna, including endemic insects, frogs, reptiles, birds, and mammals, and investigate..
A sensory system is a part of the nervous system consisting of sensory receptors that receive stimuli from the internal ..