The development of the anus was an important stage in the evolution of multicellular animals it appears to have happened at least twice following different paths in protostomes and deuterostomes.
The embryological origin of the mouth and anus is an important characteristic and forms the morphological basis for separating bilaterian animals into two natural groupings the protostomes and deuterostomes in animals at least as complex as an earthworm a dent forms in one side of the early spheroidal embryo.
Skin tags that you may be able to treat are on the outside of the anus even then youre going to need to monitor things closely and stop treatment if your body develops an allergic reaction for example.
Anal stenosis is a narrowing due to partial rupture of the anal membrane but the anus is located in the normal position 2 anal agenesis insufficient anus occurs without fistula rectum ends blindly with location of anal pit sometimes marked by.
Being infected with the human papillomavirus hpv increases the risk of developing anal cancer signs of anal cancer include bleeding from the anus or rectum or a lump near the anus tests that examine the rectum and anus are.
Anorectal malformations imperforate anus anorectal malformations also known as imperforate anus are defects that occur during the fifth to seventh weeks of fetal development with these defects the anus opening at the end of the large intestine through which stool passes and the rectum area of the large intestine just above the.
Purpose constipation is a common complaint among geriatric patients and may result in significant morbidity especially among nursing stronghomestrong residents the prevalence of constipation increases with strongdevelopmentstrong of constipation in nursing stronghomestrong residents.
External hemorrhoids occur when the veins surrounding the stronganusstrong and the strongrectumstrong become swollen and inflamed causing a lot of pain and discomfort learn about symptoms causes amp treatment of external hemorrhoids.
Stimulating the victim by such means as strongrectalstrong and oral fumigation with tobacco smoke bellows were used to drive tobacco smoke a known irritant into the intestine through the stronganusstrong as this was thought to be enough of a stimulant to engender a response in the quotalmostquot dead and the strongdevelopmentstrong of an external defibrillator was a natural.