Injuries or trauma to any part of the arm or shoulder, including bone fractures, joint dislocations, and muscle strains and sprains, are common causes of arm pain. Sometimes diseases that affect other organs in the body, like peripheral vascular disease or arthritis, can be the cause of pain in the arm.
/sporÂ·uÂ·laÂ·tion/ (sporâ³u-laÂ´shun) formation of spores. sporulation. 1 a type of reproduction that occurs in fungi, algae, and protozoa and involves the formation of spores by the spontaneous division of a cell into four or more daughter cells, each of which contains a part of the original nucleus.
Asexual reproduction: The asexual reproduction takes place by means of spores. Each spore may develop into a new individual. The spores may be produced asexually or sexually and thus named (a) asexual spores and (b) sexual spores. Under asexual reproduction, only asexual spores will be considered. Asexual spores: They are innumerable and produced on the diplont mycelium in Phycomycetes and Ascomycetes. In Basidio- mycetes they are produced on the diplont mycelium. The spores are of diverse type and borne upon special structures called the sporophores.