A proctodeum is the back ectodermal part of an alimentary canal. It is created during embryogenesis by a folding of the outer body wall. It will form the...

of the anal canal. Developmentally, this line represents the hindgut-proctodeum junction. It is an important anatomical landmark in humans, and several...

a dog Formation of anus in proto- and deuterostomes Details Precursor Proctodeum System Alimentary Artery Inferior rectal artery Vein Inferior rectal vein...

(mermaid syndrome). In reptiles, the cloaca consists of the urodeum, proctodeum, and coprodeum. Some species have modified cloacae for increased gas exchange...

deoxygenated blood to the placenta. It is externally continuous with the proctodeum and internally continuous with the cloaca. The embryonic allantois becomes...

pubic hair Scheme of digestive tract, with anus marked Details Precursor Proctodeum System Alimentary Artery Inferior rectal artery Vein Inferior rectal vein...

foregut (stomatodeum)(27,) the midgut (mesenteron)(13), and the hindgut (proctodeum)(16). In addition to the alimentary canal, insects also have paired salivary...

deoxygenated blood to the placenta. It is externally continuous with the proctodeum and internally continuous with the cloaca. The embryonic allantois becomes...

instead of blood when erect. When not copulating, it is hidden within the proctodeum compartment within the cloaca, just inside the vent. Female birds have...

ani internus. E.S. Sphincter ani externus. Details Precursor Hindgut, proctodeum Artery Superior rectal artery (above pectinate line) and inferior rectal...