Search results
Results From The WOW.Com Content Network
Paraxial mesoderm, also known as presomitic or somitic mesoderm, is the area of mesoderm in the neurulating embryo that flanks and forms simultaneously with the neural tube. The cells of this region give rise to somites , blocks of tissue running along both sides of the neural tube, which form muscle and the tissues of the back, including ...
List of human cell types derived from the germ layers. ... Mesoderm embryonic tissues (paraxial mesoderm, intermediate mesoderm, lateral plate mesoderm and notochord).
The intermediate mesoderm connects the paraxial mesoderm with the lateral plate mesoderm, and differentiates into urogenital structures. [12] In upper thoracic and cervical regions, this forms the nephrotomes. In caudal regions, it forms the nephrogenic cord. It also helps to develop the excretory units of the urinary system and the gonads. [4]
The two main types of human skin are: glabrous skin, the hairless skin on the palms and soles (also referred to as the "palmoplantar" surfaces), and hair-bearing skin. [3] Within the latter type, the hairs occur in structures called pilosebaceous units , each with hair follicle , sebaceous gland , and associated arrector pili muscle. [ 4 ]
The face and neck development of the human embryo refers to the development of the structures from the third to eighth week that give rise to the future head and neck.They consist of three layers, the ectoderm, mesoderm and endoderm, which form the mesenchyme (derived form the lateral plate mesoderm and paraxial mesoderm), neural crest and neural placodes (from the ectoderm). [1]
The mesoderm germ layer forms in the embryos of triploblastic animals. During gastrulation, some of the cells migrating inward contribute to the mesoderm, an additional layer between the endoderm and the ectoderm. [9] The formation of a mesoderm leads to the development of a coelom. Organs formed inside a coelom can freely move, grow, and ...
The mesoderm forms at the same time as the other two germ layers, the ectoderm and endoderm. The mesoderm at either side of the neural tube is called paraxial mesoderm. It is distinct from the mesoderm underneath the neural tube, which is called the chordamesoderm that becomes the notochord. The paraxial mesoderm is initially called the ...
Cephalic disorders (from Greek κεφαλή 'head') are congenital conditions that stem from damage to, or abnormal development of, the budding nervous system.. Cephalic disorders are not necessarily caused by a single factor, but may be influenced by hereditary or genetic conditions, nutritional deficiencies, or by environmental exposures during pregnancy, such as medication taken by the ...