Category: S

An axon that divides in two equal, or nearly equal, branches.  

An amnion formed by development of a cavity in the inner cell mass.  

A drug or toxin that kills parasites of the genus Schistosoma.  

A deformed fetus with a fissure in the abdomen. The limbs are rudimentary if present.  

A species occurring in many parts of Africa and tropical America, including the West Indies. Adults live in branches of the inferior mesenteric veins. Eggs are discharged through either the host’s intestine or bladder. This species causes bilharzial dysentery or Manson’s intestinal schistosomiasis.  

A species common in many parts of Asia. Adults live principally in branches of the superior mesenteric vein. Eggs work their way through the intestinal wall of the host into the lumen and are discharged with feces. Oriental schistosomiasis is caused by this species.  

A species common in Africa and southwestern Asia. Adults infest the pelvic veins of the vesical plexus. Eggs work their way through the bladder wall of the host and are discharged in the urine. Urinary schistosomiasis is caused by this organism.  

Protrusion of membranes through a congenital cleft in the lower vertebral column.  

A fetus with a cleft in a limb.  

A fragmented red blood cell that appears in the blood in a variety of bizarre shapes, from small triangular forms to round cells with irregular surfaces. Schistocytes are found in patients with hemolytic anemias, severe burns, and several other conditions.