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penyerapan sari makanan
#1
bagaimana lipatan dan jonjot usus membantu penyerapan sari makanan?

sumber: komik sains kuark level 3 edisi 1 tahun xiii
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#2
waduh...
aku gak tahu Ilma..
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#3
Small Intestine
By Atenodoro R. Ruiz, Jr., MD, Kaiser-Permanente, Santa Clara

NOTE: This is the Consumer Version. DOCTORS: Click here for the Professional Version
Biology of the Digestive System
Overview of the Digestive System
Throat and Esophagus
Stomach
Small Intestine
Pancreas
Liver
Gallbladder and Biliary Tract
Large Intestine
Rectum and Anus
Effects of Aging on the Digestive System
1
The duodenum is the first segment of the small intestine, and the stomach releases food into it. Food enters the duodenum through the pyloric sphincter in amounts that the small intestine can digest. When full, the duodenum signals the stomach to stop emptying.

The duodenum receives pancreatic enzymes from the pancreas (see Pancreas) and bile from the liver (see Liver) and gallbladder (see Gallbladder and Biliary Tract). These fluids, which enter the duodenum through an opening called the sphincter of Oddi, are important in aiding digestion and absorption. Waves of rhythmic muscular contractions (called peristalsis) also aid digestion and absorption by churning up food and mixing it with intestinal secretions.

The first few inches of the duodenal lining are smooth, but the rest of the lining has folds, small projections (villi), and even smaller projections (microvilli). These villi and microvilli increase the surface area of the duodenal lining, allowing for greater absorption of nutrients.

DigestionDigestion
Digestion
The jejunum and ileum make up the rest of the small intestine and are located below the duodenum. These parts of the small intestine are largely responsible for the absorption of fats and other nutrients. Churning movements facilitate absorption. Absorption is also enhanced by the vast surface area made up of folds, villi, and microvilli. The intestinal wall is richly supplied with blood vessels that carry the absorbed nutrients to the liver through the portal vein. The intestinal wall releases mucus, which lubricates the intestinal contents, and water, which helps dissolve the digested fragments. Small amounts of enzymes that digest proteins, sugars, and fats are also released.

The consistency of the intestinal contents changes gradually as the contents travel through the small intestine. In the duodenum, food is diluted with pancreatic enzymes and bile, which decrease stomach acidity. The contents continue to travel through the lower small intestine, becoming more liquid as they mix with water, mucus, bile, and pancreatic enzymes. Ultimately, the small intestine absorbs most of the nutrients and all but about 1 liter of fluid before emptying into the large intestine.
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#4
Small Intestine
By Atenodoro R. Ruiz, Jr., MD, Kaiser-Permanente, Santa Clara

NOTE: This is the Consumer Version. DOCTORS: Click here for the Professional Version
Biology of the Digestive System
Overview of the Digestive System
Throat and Esophagus
Stomach
Small Intestine
Pancreas
Liver
Gallbladder and Biliary Tract
Large Intestine
Rectum and Anus
Effects of Aging on the Digestive System
1
The duodenum is the first segment of the small intestine, and the stomach releases food into it. Food enters the duodenum through the pyloric sphincter in amounts that the small intestine can digest. When full, the duodenum signals the stomach to stop emptying.

The duodenum receives pancreatic enzymes from the pancreas (see Pancreas) and bile from the liver (see Liver) and gallbladder (see Gallbladder and Biliary Tract). These fluids, which enter the duodenum through an opening called the sphincter of Oddi, are important in aiding digestion and absorption. Waves of rhythmic muscular contractions (called peristalsis) also aid digestion and absorption by churning up food and mixing it with intestinal secretions.

The first few inches of the duodenal lining are smooth, but the rest of the lining has folds, small projections (villi), and even smaller projections (microvilli). These villi and microvilli increase the surface area of the duodenal lining, allowing for greater absorption of nutrients.

DigestionDigestion
Digestion
The jejunum and ileum make up the rest of the small intestine and are located below the duodenum. These parts of the small intestine are largely responsible for the absorption of fats and other nutrients. Churning movements facilitate absorption. Absorption is also enhanced by the vast surface area made up of folds, villi, and microvilli. The intestinal wall is richly supplied with blood vessels that carry the absorbed nutrients to the liver through the portal vein. The intestinal wall releases mucus, which lubricates the intestinal contents, and water, which helps dissolve the digested fragments. Small amounts of enzymes that digest proteins, sugars, and fats are also released.

The consistency of the intestinal contents changes gradually as the contents travel through the small intestine. In the duodenum, food is diluted with pancreatic enzymes and bile, which decrease stomach acidity. The contents continue to travel through the lower small intestine, becoming more liquid as they mix with water, mucus, bile, and pancreatic enzymes. Ultimately, the small intestine absorbs most of the nutrients and all but about 1 liter of fluid before emptying into the large intestine
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#5
(13-02-2017, 07:24 PM)ilma hasna hakimah Wrote: bagaimana lipatan dan jonjot usus membantu penyerapan sari makanan?

sumber: komik sains kuark level 3 edisi 1 tahun xiii
menurutku jonjot usus berfungsi untuk memperluas bidang penyerapan. bisa diumpamakan seperti saat kamu melipat karpet membentuk seperti jonjot usus, pasti bidang penyerapannya lebih luas kan.. Cool

salam kenal ilma.. Wink
Reply
#6
Small Intestine
By Atenodoro R. Ruiz, Jr., MD, Kaiser-Permanente, Santa Clara

NOTE: This is the Consumer Version. DOCTORS: Click here for the Professional Version
Biology of the Digestive System
Overview of the Digestive System
Throat and Esophagus
Stomach
Small Intestine
Pancreas
Liver
Gallbladder and Biliary Tract
Large Intestine
Rectum and Anus
Effects of Aging on the Digestive System
1
The duodenum is the first segment of the small intestine, and the stomach releases food into it. Food enters the duodenum through the pyloric sphincter in amounts that the small intestine can digest. When full, the duodenum signals the stomach to stop emptying.

The duodenum receives pancreatic enzymes from the pancreas (see Pancreas) and bile from the liver (see Liver) and gallbladder (see Gallbladder and Biliary Tract). These fluids, which enter the duodenum through an opening called the sphincter of Oddi, are important in aiding digestion and absorption. Waves of rhythmic muscular contractions (called peristalsis) also aid digestion and absorption by churning up food and mixing it with intestinal secretions.

The first few inches of the duodenal lining are smooth, but the rest of the lining has folds, small projections (villi), and even smaller projections (microvilli). These villi and microvilli increase the surface area of the duodenal lining, allowing for greater absorption of nutrients.

DigestionDigestion
Digestion
The jejunum and ileum make up the rest of the small intestine and are located below the duodenum. These parts of the small intestine are largely responsible for the absorption of fats and other nutrients. Churning movements facilitate absorption. Absorption is also enhanced by the vast surface area made up of folds, villi, and microvilli. The intestinal wall is richly supplied with blood vessels that carry the absorbed nutrients to the liver through the portal vein. The intestinal wall releases mucus, which lubricates the intestinal contents, and water, which helps dissolve the digested fragments. Small amounts of enzymes that digest proteins, sugars, and fats are also released.

The consistency of the intestinal contents changes gradually as the contents travel through the small intestine. In the duodenum, food is diluted with pancreatic enzymes and bile, which decrease stomach acidity. The contents continue to travel through the lower small intestine, becoming more liquid as they mix with water, mucus, bile, and pancreatic enzymes. Ultimately, the small intestine absorbs most of the nutrients and all but about 1 liter of fluid before emptying into the large intestine
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#7
hmmm..
begitu ya..
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#8
(13-02-2017, 07:24 PM)ilma hasna hakimah Wrote: bagaimana lipatan dan jonjot usus membantu penyerapan sari makanan?

sumber: komik sains kuark level 3 edisi 1 tahun xiii

Hallo Ilma..

lipatan dan jonjot halus ada di Ileum atau usus penyerapan.

Ileum adalah tempat terjadinya penyerapan sari-sari makanan. Di sinilah sari-sari makanan hasil proses pencernaan diserap oleh jonjot-jonjot usus (vili). Dinding jonjot usus halus tertutup oleh sel tiang. Kira-kira terdpat 500 sel tiang pada setiap jonjot. Setiap sel memuat sekitar 1.000 mikrovili.
Villi tersebut juga memperluas permukaan dinding usus sehinga penyerapan sari makanan menjadi lebih efektif. Enzim pada mikrovili akan menghancurkan makanan menjadi partikel yang cukup kecil untuk diserap.
Di dalam setiap jonjot terdapat pembuluh darah halus dan saluran limfa (pembuluh kil) yang menyerap zat makanan dari permukaan jonjot.
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#9
(13-02-2017, 07:24 PM)ilma hasna hakimah Wrote: bagaimana lipatan dan jonjot usus membantu penyerapan sari makanan?

sumber: komik sains kuark level 3 edisi 1 tahun xiii

Itu sepertinya ada hubungannya dengan proses osmosis di dalam di usus ya?,,, hmmm kira-kira sama ga yah dengan proses masuknya air di akar tumbuhan?
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#10
Apakah kamu tahu Raizel ?
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