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.
At the tissue level, membranes form a barrier or interface (basement membranes that separate epithelia from connective tissues). On another level, epithelia and connective tissues combine to form membranes that cover and protect other structures and tissues.Types of membranes:1  Mucous membranes line cavities that connect with the exterior, including the digestive, respiratory, reproductive, and urinary tracts.n another level, epithelia and connective tissues combine to form membranes that cover and protect other structures and tissues. Types of membranes: 1  Mucous membranes line cavities that connect with the exterior, including the digestive, respiratory, reproductive, and urinary tracts.