chordate animals
11Craniata — For the class of brachiopods, see Craniforma. Craniata Temporal range: Early Cambrian Recent …
12Retinoic acid — For all trans retinoic acid as a drug, see Tretinoin. For 9 cis retinoic acid as a drug, see Alitretinoin. For 13 cis retinoic acid as a drug, see Isotretinoin. All trans retinoic acid …
13Organogenesis — The endoderm produces tissue within the lungs, thyroid, and pancreas. The mesoderm aids in the production of cardiac muscle, skeletal muscle, smooth muscle, tissues within the kidneys, and red blood cells. The ectoderm produces tissues within the …
14lancelet — noun Date: circa 1836 any of a subphylum (Cephalochordata) of small translucent marine primitive chordate animals that are fishlike in appearance and usually live partially buried on the ocean floor called also amphioxus …
15tunicate — I. adjective also tunicated Etymology: Latin tunicatus, from tunica Date: circa 1623 1. a. having or covered with a tunic or tunica b. having, arranged in, or made up of concentric layers < a tunicate flower bulb > 2. of or relating to the… …
16Keratin — Not to be confused with kerogen, carotene, chitin, or creatine. Microscopy of keratin filaments inside cells. Keratin refers to a family of fibrous structural proteins. Keratin is the key structural material making up the outer layer of human… …
17Convergent extension — Convergent extension, or Convergence and Extension, is the process by which the tissue of an embryo is restructured to converge (narrow) along one axis and extend (elongate) along a perpendicular axis by cellular movement. An example of this… …
18Gavin Rylands de Beer — (* 1. November 1899 in Malden, Surrey, heute Teil von Greater London, England; † 21. Juni 1972 in Alfriston, Sussex, England) war ein englischer Zoologe und Morphologe. Inhaltsverzeichnis 1 Leben und Wirken 2 Ehrungen …
19Gavin de Beer — gGavin Rylands de Beer (* 1. November 1899 in Malden, Surrey, heute Teil von Greater London, England; † 21. Juni 1972 in Alfriston, Sussex, England) war ein englischer Zoologe und Morphologe. Inhaltsverzeichnis 1 Leben und Wirken 2 Ehrungen …
20Gavin de Beer — Sir Gavin Rylands de Beer (New Malden; 1 de noviembre de 1899 Alfriston, Sussex; 21 de junio de 1972). Embriólogo evolutivo británico, director del Museo británico de Historia Natural y presidente de la Sociedad linneana de Londres. Contenido 1… …
