A Somitic Compartment of Tendon Progenitors Summary Tendons are some of the most important tissues in the body of any organism, transferring the power created by the muscles to the bones and allowing coordinated body movements to occur. However, until recently there was very little known about the origin of this tissue and most of the research performed focused on the limbs and the tendons associated with them. Along with the limited amount of research seemingly none of it was focused on the axial
Towards the culmination of the third week of development, the mesoderm layer differentiates into three mesodermal layers. The paraxial mesoderm is the first layer that later develops to create the skull and vertebrae complex. The intermediate mesodermal region later develops into the urogenital regions while the lateral plate mesoderm differentiates to form the body cavity. The body cavity later closes on all sides when the lateral body coalesces with the midline. The gut remains connected to the
Week 4 * Folded disc * Neural plate closing to become neural groove * Neuropores are open * Heart bulge * Big paraxial mesoderm * Beginning of Guts * Pharyngeal arches start to emerge Week 5 * Forebrain * pharyngeal arches (each one has all 3 germ layers) * upper limb bud * liver bulge * placodes
trilaminar disc of cells which include the ectoderm, mesoderm, and endoderm layers. As the coelom forms, the lateral plate mesoderm divides into the splanchnic and somatic mesoderm layers. The splanchnic mesoderm lines the endoderm while the somatic mesoderm lines the ectoderm. The splanchnic mesoderm gradually forms the vitelline veins of the embryo, creating endothelial tubes which are associated with the blood islands in the extra-embryonic mesoderm around the yolk sac. Therefore, the heart and its
including transposition of the great arteries and double outlet of the right ventricle. Lefty2 deficiency results in extending the range and diffusion of Nodal, exerting further transcriptional influence across the node and into the right lateral plate mesoderm. Additionally, the level of Pitx2 was shown to be bilaterally amplified in the absence of Lefty2 (Meno et al., 2001). The Pitx2 protein is a bicoid-related homeodomain transcription factor involved in left-right asymmetric cardiogenesis as
INTRODUCTION Allergic rhinitis is a symptomatic disorder of the nose induced after exposure to allergens through IgE-mediated hypersensitivity reactions, which are characterized by four cardinal symptoms of watery rhinorrhea, nasal obstruction, nasal itching and sneezing. An increasing prevalence of allergic diseases has been observed all over the world during the last decades. Allergic rhinitis adversely affects emotional well-being and social functions of the patient
ANIMAL REPRODUCTION & DEVELOPMENT Dr Ilma • The two earthworms in this picture are mating • Each worm produces both sperm and eggs, which will fertilize – And in a few weeks, new worms will hatch Asexual And Sexual Reproduction • Both occur in the animal kingdom • Asexual reproduction is the creation of new individuals – Whose genes all come from one parent • Sexual reproduction is the creation of offspring – By the fusion of male and female gametes to form a zygote Mechanisms
nematomorpha phylum kinorhyncha phylum loricifera phylum priapulida Main Similarity of four phylum 1. They are bilateral symmetry. Bilateral symmetry is the organism or part that can be divided into two equal halves. 2. They have three germ layer, ectoderm, mesoderm, and endoderm. 3. They are pseudocoelomate which have false body cavity. Inter comparison of four phylum Phylum nematomorpha Phylum kinorhyncha Phylum loricifera Phylum priapulida Meaning in Greek or latin In Greek "nema = thread, morphe = form"
Site Plan | I. Neurons/nerve cells A neuron is a cell specialized to conduct electrochemical impulses called nerve impulses or action potentials. Neuron is the main cellular component of the nervous system, a specialized type of cell that integrates electrochemical activity of the other neurons that are connected to it and that propagates that integrated activity to other neurons. They are the basic information processing structures in the CNS.