  Sexual reproduction in fungi usually involves two different mating types. Because gametes of both mating types are about the same size, they are not called male and fema â¦ le.Rather, one mating type is called + (plus) and the other â (minus).ecause gametes of both mating types are about the same size, they are not called male and fema â¦ le. Rather, one mating type is called + (plus) and the other â (minus).
Defecation is normally assisted by taking a deep breath and trying to expel this air against a closed glottis (Valsalva maneuver). This contraction of expiratory chest muscles, diaphragm, abdominal wall muscles, and pelvic diaphragm exerts pressure on the digestive tract.
Aetna considers defecography (evacuation proctography) medically necessary in members with constipation when results of anorectal manometry and rectal balloon expulsion are inconclusive, and in whom any of the following conditions is suspected as the cause of impaired defecation:uidelines on constipation from the American Society of Colon and Rectal Surgeons (Ternent et al, 2007) stated that defecography is probably the most useful diagnostic technique for identifying internal rectal intussusception.