Human body from organs to the cells of which they are composed. The human body consists of many interacting systems of organs. These interact to maintain homeostasis, keeping the body in a stable state with safe levels of substances such as sugar and oxygen in the blood. Each system contributes to homeostasis, of itself, other systems, and the entire body. Some combined systems are referred to by joint names. For example, the nervous system and the endocrine system operate together as the neuroendocrine system. The nervous system receives information from the body, and transmits this to the brain via nerve impulses and
Radial glial cell period, and differing abilities of radial glia to respond to environmental cues have all been shown to influence the type of radial glia and radial glia-derived daughter cells that will be produced. FGF and Notch signaling regulate the proliferation of radial glia and the rate of neurogenesis, which affects the surface area expansion of the cerebral cortex and its ability to form surface convolutions known as gyri (see gyrification). Radial glial cells show high levels of calcium transient activity, which is transmitted between RGCs in the ventricular zone and along the radial fibers bidirectionally to/from the cortical plate. The calcium