WordNet

of or characteristic of low rank or importance
one of lesser rank or station or quality
having an orbit between the sun and the Earths orbit; "Mercury and Venus are inferior planets"
lower than a given reference point; "inferior alveolar artery"
of low or inferior quality
of or involving the rectum; "rectal cancer"

PrepTutorEJDIC

(階級・親分・質・程度などが)『下の』,『劣る』, / (位置が)低い,下方の / 目下の者;劣った人
直腸(rectum)の

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2013/06/30 05:02:43」(JST)

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The inferior rectal artery (inferior hemorrhoidal artery) is an artery that supplies blood to the lower half of the anal canal.

Structure[edit]

The inferior rectal artery arises from the internal pudendal artery as it passes above the ischial tuberosity.

Piercing the wall of the pudendal canal, it divides into two or three branches which cross the ischioanal fossa, and are distributed to the muscles and integument of the anal region, and send offshoots around the lower edge of the gluteus maximus to the skin of the buttock.

They anastomose with the corresponding vessels of the opposite side, with the superior and middle rectal arteries, and with the perineal artery.

Additional images[edit]

The perineum. The integument and superficial layer of superficial fascia reflected.

External links[edit]

SUNY Figs 41:04-05 - "Inferior view of female perineum, branches of the internal pudendal artery."
SUNY Figs 42:03-05 - "Branches of internal pudendal artery in the male perineum."
SUNY Anatomy Image 9077
SUNY Anatomy Image 9085
perineum at The Anatomy Lesson by Wesley Norman (Georgetown University) (analtriangle3)
Human anatomy at Dartmouth figures/chapter_32/32-2.HTM
Human anatomy at Dartmouth figures/chapter_32/32-3.HTM

This article incorporates text from a public domain edition of Gray's Anatomy.

This cardiovascular system article is a stub. You can help Wikipedia by expanding it.

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「下直腸動脈」

Artery: Inferior rectal artery
	The inferior rectal arteries(unlabeled) surround the anus.
	The bloodvessels of the rectum and anus, showing the distribution and anastomosis on the posterior surface near the termination of the gut. (Labeled as hemorrhoidal artery.)
Latin	Arteria rectalis inferior,; arteria haemorrhoidalis inferior
Gray's	subject #155 619
Supplies	Anal canal
Source	Internal pudendal artery
Vein	Inferior rectal veins