3.1.3 The Small Intestine Flashcards

1
Q

Where do the Small Intestines extend from / to?

A

From - The Pyloric Sphincter

To - The Ileocecal Valve

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2
Q

What are the 3 parts of the Small Intestines?

A
  1. The Duodenum
  2. The Jejunum
  3. The Ileum
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3
Q

Which part of the Small Intestines has the opening of the Bile and Pancreatic Duct?

A

The Duodenum

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4
Q

What are the 4 parts of the Duodenum?

Proximal to Distal

A
  1. The Superior Part of the Duodenum
  2. The Descending Part of the Duodenum
  3. The Inferior Part of the Duodenum
  4. The Ascending Part of the Duodenum
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5
Q

Where is the Foregut / Midgut Boundary in the Small Intestine?

A

Between the Descending and Inferior Parts of the Duodenum

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6
Q

How is the Duodenum Peritonised?

A

It is Retroperitoneal

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7
Q

How is the Jejunum Peritonised?

A

It is Intraperitoneal

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8
Q

How is the Ileum Peritonised?

A

It is Intraperitoneal

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9
Q

What is the Shortest, Widest, and most Fixed part of the Small Intestine?

A

The Duodenum

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10
Q

Where is the Boundary between the Jejunum and the Ileum?

A

There isn’t one, there is a gradual change

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11
Q

What is the characteristic Colour of the:

a) Jejunum
b) Ileum

A

Jejunum - Deep Red

Ileum - Paler Pink

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12
Q

What is the characteristic Wall of the:

a) Jejunum
b) Ileum

A

Jejunum - Thick Intestinal Wall

Ileum - Thin Intestinal Wall

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13
Q

What is the characteristic Vascularity of the:

a) Jejunum
b) Ileum

A

Jejunum - There is Greater Vascularity

Ileum - There is Less Vascularity

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14
Q

What is the characteristic Vasa Recta of the:

a) Jejunum
b) Ileum

A

Jejunum - Longer

Ileum - Shorter

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15
Q

What are Vasa Recta?

A

Straight Arteries coming from the Arcades in the Mesentery

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16
Q

What is the characteristic Arcades of the:

a) Jejunum
b) Ileum

A

Jejunum - Few

Ileum - Many

17
Q

What are Arcades?

A

Loops of Arteries around the Jejunum and Ileum

18
Q

What is the characteristic Levels of fat in the Mesentery of the:

a) Jejunum
b) Ileum

A

Jejunum - Less

Ileum - More

19
Q

What is the characteristic Circular Folds of the:

a) Jejunum
b) Ileum

A

Jejunum - Large, Tall, and Closely Packed

Ileum - Fewer, Short, and Sparse

20
Q

Which part of the Autonomic Nervous System stimulations reduces the secretion and motility of the intestine, and also acts as a vasoconstrictor?

A

The Sympathetic Nervous System