In morphology: Embryology. The development of the seed plant is basically different from that of an animal. The egg cell of a seed plant is retained within the enlarged lower part, or ovary, of the seed-bearing organ (pistil) of a flower; two sperm nuclei pass through a structure called a pollen tubeâ¦ Read More; wheat grains
Spleen Pain Causes 1  : Swelling of spleen is called splenomegaly. It can be caused by liver diseases, infections and blood related problems and also irregularity in the lymph system.  Certain infections like mononucleosis (caused by virus), toxoplasmosis (caused by parasite) and endocarditis (caused by bacteria) may cause pain in the spleen.
A spleen may rupture due to: 1  Injury to the left side of the body. A ruptured spleen is typically caused by a blow to the left upper abdomen or the left lower chest, such as might happen during sporting mishaps, fistfights and car crashes. 2  An enlarged spleen. Your spleen can become enlarged when blood cells accumulate in the spleen.