Somite, in embryology, one of a longitudinal series of blocklike segments into which the mesoderm, the middle layer of tissue, on either side of the embryonic spine becomes divided. The term somite is also used more generally to refer to a body segment, or metamere, of a segmented animal.Click to see full answer. Similarly, what are the somites?The somites (outdated term: primitive segments) are a set of bilaterally paired blocks of paraxial mesoderm that form in the embryonic stage of somitogenesis, along the head-to-tail axis in segmented animals.Subsequently, question is, how many somites does a human embryo have? In humans 42-44 somite pairs 9 – 13 are formed along the neural tube. These range from the cranial region up to the embryo’s tail. Several caudal somites disappear again, which is why only 35-37 somite pairs can be counted in the end. Subsequently, one may also ask, what tissues do somites give rise to? Somites are precursor populations of cells that give rise to important structures associated with the vertebrate body plan and will eventually differentiate into dermis, skeletal muscle, cartilage, tendons, and vertebrae.What is segmentation in embryology?Segmentation in biology is the division of some animal and plant body plans into a series of repetitive segments. This article focuses on the segmentation of animal body plans, specifically using the examples of the taxa Arthropoda, Chordata, and Annelida.
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