Economic activity produces consumer goods or provides services. Examples of primary economic activities include these examples: Commercial fishing; Farming - growing crops (arable farming) or animal husbandry (pastoral farming) Quarrying - extracting sand or gravel; Mining of minerals, oil and gas extraction, and production
Meninges. A series of membranous layers of connective tissue that protect the central nervous system (brain and spinal cord). Damage or infection to the meninges, such as in meningitis, can cause serious neurological damage and even death.Mentioned in: Campylobacteriosis, Enterovirus Infections, Shigellosis, West Nile Virus. series of membranous layers of connective tissue that protect the central nervous system (brain and spinal cord). Damage or infection to the meninges, such as in meningitis, can cause serious neurological damage and even death. Mentioned in: Campylobacteriosis, Enterovirus Infections, Shigellosis, West Nile Virus.
The periosteum consists of an inner osteogenic layer and an outer fibrous layer. Periosteum consists of dense irregular connective tissue. Periosteum is divided into an outer fibrous layer and inner cambium layer (or osteogenic layer). The fibrous layer contains fibroblasts, while the cambium layer contains progenitor cells that develop into osteoblasts.