Developmental Origins of Resident Central Nervous System Microgila Part 2

Embryo hematopoiesis: The first "genuine" hematopoietic stem cell embryo (deterministic) hematopoiesis occurs first in the aortic paravertebral spinal cord (P-Sp) and then in the aortic-gonad-septum (AGM) region just after the beginning of circulation. At E 8.5 at E 10, clear hematopoietic stem cells (dHSC) are generated from the ventral lining of the dorsal aorta (Yokomizo et al., 2010), but the mechanism by which dHSC emerges is unknown. Four models for the mechanism of dHSC appearance have been proposed: 1) endothelial progenitor cell-producing vascular endothelial cells (Jaffredo et al., 1998), 2) angioblast-producing endothelial cells from urogenital uplift.

The nervous system is divided into three parts. Central nervous system including brain, brain stem, spinal cord, sensory receptor and effector muscle, peripheral nervous system including body organs, and autonomic nervous system are part of the peripheral nervous system and central nervous system. Built-in and management of mainly unconscious functions (Barker & Barasi, 2005). Sexual reactions activate all of these systems. (A) central nervous system, (b) peripheral nervous system (a) autonomic nervous system controls the secretion of smooth muscle and all male reproductive organs (Dail, 1993).

Peripheral nervous system; this is the nerve around the body. The autonomic nervous system (ANS) is a part of the peripheral nervous system that is controlled by the central nervous system (CNS), exists in the body, and affects organs and soft tissues. The autonomic nervous system is automated and controls optional body function. It is divided into two parts, the sympathetic nervous system and the parasympathetic nervous system. Adjust glands, adrenal medulla, smooth muscle tissue, organs and cardiac function.

The central nervous system (CNS) is a part of the nervous system consisting of the brain and the spinal cord. The central nervous system integrates the received information and coordinates and affects the activities of various parts of the symmetrical animal body (all multicellular animals except radially symmetrical animals such as sponges and jellyfish) It is called like this. Most of the nervous system is included. Many people believe that the retina and optic nerve (cranial nerve II), as well as the olfactory nerve (cranial nerve I) and the olfactory epithelium as part of the central nervous system synapse directly to brain tissue without intermediate ganglia. Thus, the olfactory epithelium is the only central nervous tissue that is in direct contact with the environment and is open for therapeutic treatment. The central nervous system is contained in the posterior body cavity, the brain is housed in the cranial cavity, and the spinal cord is located in the spinal canal.