The chemical reactions and pathways resulting in the formation of the nucleotide cAMP (cyclic AMP, adenosine 3',5'-cyclophosphate) [goid 6171] [pmid 10899090] [evidence TAS]; The process whereby phagocytes engulf external particulate material. The particles are initially contained within phagocytic vacuoles (phagosomes), which then fuse with primary lysosomes to effect digestion of the particles [goid 6909] [pmid 8360491] [evidence TAS]; A form of programmed cell death induced by external or internal signals that trigger the activity of proteolytic caspases, whose actions dismantle the cell and result in cell death. Apoptosis begins internally with condensation and subsequent fragmentation of the cell nucleus (blebbing) while the plasma membrane remains intact. Other characteristics of apoptosis include DNA fragmentation and the exposure of phosphatidyl serine on the cell surface [goid 6915] [pmid 7818494] [evidence TAS]; The immediate defensive reaction (by vertebrate tissue) to infection or injury caused by chemical or physical agents. The process is characterized by local vasodilation, extravasation of plasma into intercellular spaces and accumulation of white blood cells and macrophages [goid 6954] [pmid 8360491] [evidence TAS]; A defense response that is mediated by cells [goid 6968] [pmid 10051547] [evidence TAS]; The cascade of processes by which a signal interacts with a receptor, causing a change in the level or activity of a second messenger or other downstream target, and ultimately effecting a change in the functioning of the cell [goid 7165] [evidence IEA]; The series of molecular signals generated as a consequence of a transmembrane receptor tyrosine kinase binding to its physiological ligand [goid 7169] [pmid 16939974] [evidence EXP]; The series of molecular signals generated as a consequence of a G-protein coupled receptor binding to its physiological ligand [goid 7186] [evidence IEA]; The series of molecular signals generated as a consequence of a G-protein coupled receptor binding to its physiological ligand, followed by modulation of adenylyl cyclase activity and a subsequent change in the concentration of cyclic AMP [goid 7188] [pmid 10899090] [evidence TAS]; Any process that initiates the activity of the inactive enzyme adenylate cyclase [goid 7190] [pmid 16805430] [evidence EXP]; Any process that mediates the transfer of information from one cell to another [goid 7267] [pmid 7818494] [evidence TAS]; The process whose specific outcome is the progression of the central nervous system over time, from its formation to the mature structure. The central nervous system is the core nervous system that serves an integrating and coordinating function. In vertebrates it consists of the brain, spinal cord and spinal nerves. In those invertebrates with a central nervous system it typically consists of a brain, cerebral ganglia and a nerve cord [goid 7417] [pmid 10945659] [evidence TAS]; The sequential process by which the multiple coagulation factors of the blood interact, ultimately resulting in the formation of an insoluble fibrin clot; it may be divided into three stages: stage 1, the formation of intrinsic and extrinsic prothrombin converting principle; stage 2, the formation of thrombin; stage 3, the formation of stable fibrin polymers [goid 7596] [pmid 10899090] [evidence TAS]; The series of events required for an organism to receive a sensory stimulus, convert it to a molecular signal, and recognize and characterize the signal [goid 7600] [pmid 9262401] [evidence TAS]; The flow of blood through the body of an animal, enabling the transport of O2 and nutrients to the tissues and the removal of waste products [goid 8015] [pmid 9262401] [evidence TAS]