under surface of the liver. It then descends
perpendicularly in front of the right kidney, and passes transversely
across the lower portion of the spinal column, behind the colon, and
terminates in the jejunum. The ducts from the liver and pancreas open
into the perpendicular portion, about six inches from the stomach.

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244. Explain fig. 60. What is the length of the small intestine, and
how is it divided? What is the length of the large intestine? Give its
divisions. 245. Describe the duodenum.

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246. The JEJUNUM is continuous with the duodenum. It is thicker than
the rest of the small intestine, and has a pinkish tinge.

247. The ILEUM is smaller, and thinner in texture, and somewhat paler,
than the jejunum. There is no mark to distinguish the termination of
the one or the commencement of the other. The ileum terminates near
the right haunch-bone, by a valvular opening into the colon at an
obtuse angle. This arrangement prevents the passing of substances from
the colon into the ileum. The jejunum and ileum are surrounded above
and at the sides by the colon.

248. The small intestine, like the stomach, has three coats. The
inner, or mucous coat is thrown into folds, or valves. In consequence
of this valvular arrangement, the mucous membrane is more extensive
than the other tissues, and gives a greater extent of surface with
which the aliment comes in contact. There are imbedded under this
membrane an immense number of minute glands, and it has a great number
of piles, like those upon velvet. For this reason, this membrane is
sometimes called the _vil'lous_ coat.

249. The CAECUM is the blind pouch, or cul-de-sac, at the commencement
of the large intestine. Attached to its extremity is the _ap-pend'ix
verm-i-form'is_, (a long, worm-shaped tube.) It is from one to six
inches in length, and of the size of a goose-quill.

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What important ducts open into it? 246. Describe the jejunum. 247. The
ileum. 248. What is said of the coats of the intestines? Why is the
mucous membrane sometimes called the villous coat? 249. Describe the
caecum.

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250. The COLON is divided into three parts--the _ascending_,
_transverse_, and _descending_. The ascending colon passes upward from
the right haunch-bone to the under surface of the liver. It then bends
inward, and crosses the upper part of the abdomen, below the liver