Synonymer & Information om | Engelska ordet ECTODERM

Exempel på hur man kan använda ECTODERM i en mening

• During development, somatic cells will become more specialized and form the three primary germ layers: ectoderm, mesoderm, and endoderm.
• These three germ layers are the ectoderm (outer layer), mesoderm (middle layer), and endoderm (inner layer).
• Generally speaking, the ectoderm differentiates to form epithelial and neural tissues (spinal cord, nerves and brain).
• Invagination is the morphogenetic processes by which an embryo takes form, and is the initial step of gastrulation, the massive reorganization of the embryo from a simple spherical ball of cells, the blastula, into a multi-layered organism, with differentiated germ layers: endoderm, mesoderm, and ectoderm.
• The ear develops from the first pharyngeal pouch and six small swellings that develop in the early embryo called otic placodes, which are derived from the ectoderm.
• After blastulation, the trophoblast is contiguous with the ectoderm of the embryo and is referred to as the trophectoderm.
• Ectoderm from the region of the dorsal lip of the blastopore of a developing salamander embryo was transplanted into another embryo and this "organizer" tissue “induced” the formation of a full secondary axis changing surrounding tissue in the original embryo from ectodermal to neural tissue.
• Some animals, like cnidarians, produce two germ layers (the ectoderm and endoderm) making them diploblastic.
• During organogenesis, the three germ layers formed from gastrulation (the ectoderm, endoderm, and mesoderm) form the internal organs of the organism.
• Triploblasty is a condition of the gastrula in which there are three primary germ layers: the ectoderm, mesoderm, and endoderm.
• Diploblasty is a condition of the blastula in which there are two primary germ layers: the ectoderm and endoderm.
• From fertilization to day 18, the endoderm, ectoderm and mesoderm have been forming inside the embryo, and are completely formed by day 18, the same day the placenta forms.
• In primary neurulation, the layer of ectoderm divides into three sets of cells: the neural tube (future brain and spinal cord), epidermis (skin), and neural crest cells (connects epidermis and neural tube and will migrate to make neurons, glia, and skin cell pigmentation).
• In the outer part of the intermediate mesoderm, immediately under the ectoderm, in the region from the fifth cervical segment to the third thoracic segment, a series of short evaginations from each segment grows dorsally and extends caudally, fusing successively from before backward to form the pronephric duct.
• Echinococcus is triploblastic – it has three layers – outermost ectoderm, middle mesoderm, and inner endoderm.
• Animals with radial symmetry, such as cnidarians, produce two layers, called the ectoderm and endoderm.
• A characteristic of Nematoda is the one-way digestive tract, with a pseudocoelom (body cavity made up of only an ectoderm and endoderm).
• In embryology, a neurogenic placode is an area of thickening of the epithelium in the embryonic head ectoderm layer that gives rise to neurons and other structures of the sensory nervous system.
• For instance, neural stem cells from the brain, which are derived from ectoderm, can differentiate into ectoderm, mesoderm, and endoderm.
• The presumed pathogenesis of acalvaria is the faulty migration of the membranous neurocranium with normal placement of the embryonic ectoderm, resulting in the absence of the calvaria, but with an intact layer of skin over the brain parenchyma.

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