The small intestine extends from the pylorus to the ileocecal junction. It has three parts - the duodenum, jejunum, and ileum. Key features that aid absorption include its length of 6 meters, presence of circular folds, villi, microvilli, intestinal glands, and lymphatic follicles. The duodenum is the shortest and most fixed part, located behind the head of the pancreas. It has four parts that differ in length, course, and peritoneal attachments. The duodenum contains Brunner's glands and openings for the bile and pancreatic ducts.
If you like share this PPT presentation to nursing students. The pancreas is an organ and a gland. Glands are organs that produce and release substances in the body. The pancreas performs two main functions: Exocrine function: Produces substances (enzymes) that help with digestion.
If you like share this PPT presentation to nursing students. The pancreas is an organ and a gland. Glands are organs that produce and release substances in the body. The pancreas performs two main functions: Exocrine function: Produces substances (enzymes) that help with digestion.
The small intestine is the part of the alimentary canal that is continuous with the stomach at the pyloric orifice and leads into the large intestine through the iliocaecal valve. It is the part where the chemical digestion of food is completed and most of the absorption of nutrients take place.
It extends from the ileum to the anus.
It reabsorbs water converting liquid chyme into semi solid stools.
It consists of the following parts: 1)Caecum and vermiformis appendix. 2)Ascending colon and hepatic flexure. 3) Transverse colon and splenic flexure 4)Descending colon 5)Sigmoid colon 6) Rectum and 7) Anal canal.
The proximal half as far as the splenic flexure – reabsorbs water and electrolytes from fluid chyme .
The distal colon beyond the splenic flexure-stores formed faeces until they are excreted.
he spleen is a fist-sized organ found in the upper left side of your abdomen, next to your stomach and behind your left ribs. It's an important part of your immune system but you can survive without it. This is because the liver can take over many of the spleen's functions
anatomy of large intestine all info. is from snell clinical anatomy
this lecture composed of :- cecum , appendix , colon , rectum and anal canal
with all relation (location , blood supply , lymphatic drainage and nerve supply)
6. ANATOMY OF THE KIDNEY, URETER & POSTERIOR.pdfmarkmuiruri581
Anatomy of Urinary System
Urinary System Organs
Kidneys (2)
Ureters (2)
Urinary bladder
Urethra
Kidney Functions
Control blood volume and composition.
Filter blood plasma, eliminate wastes.
Regulate blood volume, pressure, and fluid osmolarity.
Secrete renin and erythropoietin (EPO).
Regulate PCO2, acid-base balance.
Synthesize calcitriol (Vitamin D).
Detoxify free radicals and drugs.
Perform gluconeogenesis.
Kidney Anatomy
Renal Fascia: Attaches to the abdominal wall.
Adipose Capsule: Provides fat cushioning for the kidney.
Renal Capsule: Fibrous sac that protects from trauma and infection.
Renal Sinus: Contains blood vessels, lymphatics, nerves, and urine-collecting structures.
Renal Parenchyma:
Outer Cortex
Inner Medulla
Renal Pyramids: Extensions of cortex dividing medulla.
Renal Columns: Connect cortex and medulla.
Renal Pelvis: Collects urine from pyramids.
Ureter: Carries urine to the bladder.
Remember, the kidneys play a crucial role in maintaining homeostasis by regulating fluid balance, electrolytes, and waste elimination. Ureter Anatomy
Overview
The ureters are bilateral, muscular, tubular structures responsible for transporting urine from the kidneys to the urinary bladder for storage and eventual excretion.
After blood filtration in the kidneys, the filtrate undergoes reabsorption and exudation along the convoluted tubules.
The urine then passes through the collecting tubules and enters the collecting ducts.
From the collecting ducts, it flows through the calyces into the renal pelvis, marking the beginning of the ureters.
Histology of Ureter
The lumen of each ureter is lined by a mucosal layer of urothelium (transitional epithelium).
The ureteral wall contains two muscular layers:
Longitudinal layer
Circular layer
In the lower segment of the ureters, an additional longitudinal layer is found proximal to the bladder.
Urine is propelled along the ureters by peristaltic motions initiated by pacemaker cells in the proximal renal pelvis.
Relations
Both ureters pass inferiorly over the abdominal surface of the psoas major muscle.
The right ureter travels posterior to the duodenum and is crossed by branches of the superior mesenteric vessels.
The left ureter is also posterior to the psoas major and is crossed by branches of the inferior mesenteric vessels.
Posterior Abdominal Wall
Construction
Bony: Extends from the 12th rib above to the pelvic brim below.
Muscular part: Composed of muscles and fasciae.
Fasciae: Provides stability and support for retroperitoneal organs, vessels, and nerves.
Remember, understanding the anatomy of the ureter and posterior abdominal wall is essential for clinical pracPosterior Abdominal Wall
Construction
Bony: Extends from the 12th rib above to the pelvic brim below.
Muscular part: Composed of muscles and fasciae.
Fasciae: Provides stability and support for retroperitoneal organs, vessels, and nerves.
Muscles of Posterior Abdominal Wall
Psoas Major:
Origin: Continuously attached from T12 (lower border) to L5
Empowering ACOs: Leveraging Quality Management Tools for MIPS and BeyondHealth Catalyst
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In this session, we will explore how a robust quality management solution can empower your organization to meet regulatory requirements and improve processes for MIPS reporting and internal quality programs. Learn how our MeasureAble application enables compliance and fosters continuous improvement.
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Dr. David Greene, founder and CEO of R3 Stem Cell, is at the forefront of groundbreaking research in the field of cardiology, focusing on the transformative potential of stem cell therapy. His latest work emphasizes innovative approaches to treating heart disease, aiming to repair damaged heart tissue and improve heart function through the use of advanced stem cell techniques. This research promises not only to enhance the quality of life for patients with chronic heart conditions but also to pave the way for new, more effective treatments. Dr. Greene's work is notable for its focus on safety, efficacy, and the potential to significantly reduce the need for invasive surgeries and long-term medication, positioning stem cell therapy as a key player in the future of cardiac care.
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The small intestine is the part of the alimentary canal that is continuous with the stomach at the pyloric orifice and leads into the large intestine through the iliocaecal valve. It is the part where the chemical digestion of food is completed and most of the absorption of nutrients take place.
It extends from the ileum to the anus.
It reabsorbs water converting liquid chyme into semi solid stools.
It consists of the following parts: 1)Caecum and vermiformis appendix. 2)Ascending colon and hepatic flexure. 3) Transverse colon and splenic flexure 4)Descending colon 5)Sigmoid colon 6) Rectum and 7) Anal canal.
The proximal half as far as the splenic flexure – reabsorbs water and electrolytes from fluid chyme .
The distal colon beyond the splenic flexure-stores formed faeces until they are excreted.
he spleen is a fist-sized organ found in the upper left side of your abdomen, next to your stomach and behind your left ribs. It's an important part of your immune system but you can survive without it. This is because the liver can take over many of the spleen's functions
anatomy of large intestine all info. is from snell clinical anatomy
this lecture composed of :- cecum , appendix , colon , rectum and anal canal
with all relation (location , blood supply , lymphatic drainage and nerve supply)
6. ANATOMY OF THE KIDNEY, URETER & POSTERIOR.pdfmarkmuiruri581
Anatomy of Urinary System
Urinary System Organs
Kidneys (2)
Ureters (2)
Urinary bladder
Urethra
Kidney Functions
Control blood volume and composition.
Filter blood plasma, eliminate wastes.
Regulate blood volume, pressure, and fluid osmolarity.
Secrete renin and erythropoietin (EPO).
Regulate PCO2, acid-base balance.
Synthesize calcitriol (Vitamin D).
Detoxify free radicals and drugs.
Perform gluconeogenesis.
Kidney Anatomy
Renal Fascia: Attaches to the abdominal wall.
Adipose Capsule: Provides fat cushioning for the kidney.
Renal Capsule: Fibrous sac that protects from trauma and infection.
Renal Sinus: Contains blood vessels, lymphatics, nerves, and urine-collecting structures.
Renal Parenchyma:
Outer Cortex
Inner Medulla
Renal Pyramids: Extensions of cortex dividing medulla.
Renal Columns: Connect cortex and medulla.
Renal Pelvis: Collects urine from pyramids.
Ureter: Carries urine to the bladder.
Remember, the kidneys play a crucial role in maintaining homeostasis by regulating fluid balance, electrolytes, and waste elimination. Ureter Anatomy
Overview
The ureters are bilateral, muscular, tubular structures responsible for transporting urine from the kidneys to the urinary bladder for storage and eventual excretion.
After blood filtration in the kidneys, the filtrate undergoes reabsorption and exudation along the convoluted tubules.
The urine then passes through the collecting tubules and enters the collecting ducts.
From the collecting ducts, it flows through the calyces into the renal pelvis, marking the beginning of the ureters.
Histology of Ureter
The lumen of each ureter is lined by a mucosal layer of urothelium (transitional epithelium).
The ureteral wall contains two muscular layers:
Longitudinal layer
Circular layer
In the lower segment of the ureters, an additional longitudinal layer is found proximal to the bladder.
Urine is propelled along the ureters by peristaltic motions initiated by pacemaker cells in the proximal renal pelvis.
Relations
Both ureters pass inferiorly over the abdominal surface of the psoas major muscle.
The right ureter travels posterior to the duodenum and is crossed by branches of the superior mesenteric vessels.
The left ureter is also posterior to the psoas major and is crossed by branches of the inferior mesenteric vessels.
Posterior Abdominal Wall
Construction
Bony: Extends from the 12th rib above to the pelvic brim below.
Muscular part: Composed of muscles and fasciae.
Fasciae: Provides stability and support for retroperitoneal organs, vessels, and nerves.
Remember, understanding the anatomy of the ureter and posterior abdominal wall is essential for clinical pracPosterior Abdominal Wall
Construction
Bony: Extends from the 12th rib above to the pelvic brim below.
Muscular part: Composed of muscles and fasciae.
Fasciae: Provides stability and support for retroperitoneal organs, vessels, and nerves.
Muscles of Posterior Abdominal Wall
Psoas Major:
Origin: Continuously attached from T12 (lower border) to L5
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2. Introduction
◦It extends from the pylorus to the ileocaecal junction.
◦About 6 metres long.
◦Length of small intestine – male>female
◦Length of small intestine is greater in cadaver, due to
loss of tone than in the living
◦It has basically two parts
1. Upper part (fixed duodenum 25cm length)
2. Lower part {mobile part (⅖ jejunum, ⅗ ileum)}
3.
4. RELEVANT FEATURES
1. Large surface area(absorption)
◦ Greater length of intestine
◦ Presence of circular folds of mucous membrane villi and microvilli.
◦ Circular folds of mucous membrane, plicae circulares or valves of kerckring from
complete or incomplete circles. These folds are permanent and are not obliterated
by distension.
◦ Folds -*begin- 2nd part of duodenum(large and closely set below the
level of major duodenal papilla and continue to proximal half of jejunum)
*diminish progressively (size and no.)- distal half of jejunum & proximal half of ileum
*absent- distal half of ileum
◦ Intestinal villi are finger like projection of mucous membrane, just visible to naked
eye. It gives velvety appearance to the surface of intestional mucosa. Each villus
covered by a layer of absorptive columnar cells.
5.
6. 2.Intestinal glands or Crypts of liberkühn
◦ Simple tubular glands distributed over the entire mucous membrane of jejunum
and ileum.
◦ Crypts of liberkühn get open by small circular aperture on the surface of mucous
membrane between the villi.
◦ It secrete digestive enzyme and mucous.
◦ Epithellial cell between Crypts show high level of mitotic activity. These cells get
replaced every two to four days.
★Duodenal glands or Brunner’s glands
◦ Lies in submucosa.
◦ Small, compound tubuloacinar glands
◦ Secrete mucus
7.
8. 3. Lymphatic follicles
◦ Mucous membrane contain 2 type of lymph node.(most numerous in puberty but no.
decreases during old age)
(1)solitary lymphatic follicles.
◦ 1 to 2 mm in diameter
◦ Distributed throughout the small and large intestine.
(2) Aggregated lymphatic follicles or Peyer’s patches.
◦ Form circular or oval patches
◦ Length 2 to 10 cm and containing 10 to over 200 follicles.
◦ Largest and most numerous in the ileum.
◦ Small circular and fewer- distal jejunum
◦ Get ulcerated(oval ulcers) in typhoid fever.
◦ Each villus has central lymph vessel called as lacteals. Lymph from lacteals drains into
plexuses in the walls of the gut and from there to regional lymph node.
9.
10. •Lymphatics(lacteals)
◦ Circular course in the wall of the intestine.
◦ Tubercular ulcers and subsequent strictures are due to involvement of these
lymphatics
◦ Large lymphatic vessels formed at the mesenteric border pass to the mesenteric
lymph node.
11. •Nerve supply
◦ Sympathetic (T9 to T11) as well as parasympathetic (vagus), both pass through the coelic
and superior mesenteric plexuses.
◦ Nerves from myenteric plexus of Auerbach, contain.
.parasympathetic ganglia between circular and longitudinal muscle coats
◦ Fibres from myenteric plexus form the submucous plexus of Meissner contain –
parasympathetic ganglia
◦ Sympathetic nerves-
.motor – sphincter and muscularis mucosae
.inhibitory- peristaltic movements
◦ Parasympathetic nerves.
.stimulate- peristalsis
. Inhibit- sphincter
◦ Nerve plexuses and neurotransmitter of the gut are quite complex called Enteric nervous
system
12. Small intestine
◦ It is divided into duodenum, jejunum and ileum.
◦ Mucosa: characteristic features-
◦ Plicae circularis (valves of Kerkring)
◦ Villi & Microvilli
◦ Goblet cells (few)
◦ Crypts of Lieberkuhn (intestinal glands)
◦ Glands are lined by columnar cells, goblet cells,
Paneth cells & enteroendocrine cells
◦ Submucosa: contains blood vessels, lymphatics
and Meissner’s plexus.
◦ Muscularis externa: Outer longitudinal and
inner circular layers of smooth muscle.
◦ Serosa/Adventitia
13. DUODENUM
Defination and location
◦ Shortest, widest and most fixed part of small intestine
◦ Extends from pylorus to duodenojejunal flexure
◦ Curved around the head of pancrease in the form of letter c
◦ It lies above the level of umbilicus, opposite L1 , L2, L3.
Length parts and peritoneal relations
◦ 25 cm long and divided into 4 parts
1.First or superior part, 5cm or 2inches long
2. Second or descending part, 7.5cm or 3inches long
3.Third or horizontal part, 10cm or 4 inch long
4. Fourth or ascending part, 2.5cm or 1inch long.
◦ retroperitoneal and fixed except at its two ends where it is suspended by folds of peritoneum
◦ Anteriorly, the duodenum is only partly covered with paeritoneum.
14.
15. First/superior part
It begins at the pylorus and passes backwards, upwards and to the right to meet the
second part at the superior duodenal flexure.
peritoneal relations:
◦ Proximal 2.5cm is movable.
◦ Attached :Above – lesser omentum
below- greater omentum
◦ Distal 2.5cm fixed, retroperitoneal, anterior aspect covered with paeritoneum.
Visceral relations:
◦ Anteriorly- quadrate love of liver and gallbladder
◦ Posteriorly- gastroduodenal artery, bile duct and portal vein
◦ Superiorly – epiploic foramen
◦ Inferiorly- head and neck of pancreas.
16.
17. Second/Descending part
Course:
◦ 7.5 cm Long .
◦ Begins at superior duodenal flexure, passes downwards to reach
the lower border of the third lumbar vertebra, where it curves
towards the left at the inferior duodenal flexure, to become
continuous with the third part
Peritoneal relations:
◦ Retroperitoneal and fixed.
◦ Anterior surface is covered with peritoneum, except near the
middle, directly related to colon.
Visceral relations:
Anteriorly Posteriorly-
1.Right love of the liver 1. Anterior surface of the
right kidney near medical border
2.Transverse colon 2. Right renal vessels
3.Root of the transverse mesocolon 3. Right edge of the inferior
vena cava
4.Small intestine 4. Right psoas major
Medially-
1.Head of the pancreas
2. The bile duct
Laterally-
.right colic flexure
18.
19. Special features of Second part of the duodenum (interior)
a. Major duodenal papilla is an elevation present posteromedially, 8
to 10 cm distal to the pylorus. The hepatopancreatic ampulla opens
at the summit of the papilla.
b. The minor duodenal papilla is present 6 to 8cm distal to the
pylorus, and presents the opening of the accessory pancreatic duct
c. Below major duodenal papilla, a longitudinal fold called plica
longitudinal is seen
20. Third/ Horizontal part
Course:
◦ Begins at inferior duodenal flexure, on the right side of the lower border of the L3.
◦ It passes almost horizontally and slightly upwards in front of the IVC
◦ Ends by joining the 4th part in front of the abdominal aorta
Peritoneal Reations:
◦ Retroperitoneal and fixed.
◦ Anterior surface is covered with peritoneum, except in median plane, it crossed by superior mesenteric vessels and by root of
mesentery.
Visceral relations:
Anteriorly:
1. Superior mesenteric
vessels
2. Root of mesentery
Posteriorly:
1. Right ureter
2. Right psoas major
3. Right testicular or
ovarian vessels
4. IVC
5. Abdominal aorta
with origin of
inferior mesenteric
artery
Superiorly:
Head of the pancreas with
uncinate process
Inferiorly:
Coils of jejunum
21.
22. Fourth/ Ascending part
Course:
◦ It runs upwards on or immediately to the left of the aorta, up to the upper border of the second lumbar vertebra, where it turns forwards to
become continuous with the jejunum at the duodenojejunal flexure.
Peritoneal relations:
. It is mostly retroperitoneal, and covered with peritoneum only anteriorly.
.The terminal part is suspended by the uppermost part of the mesentery, and is mobile.
Visceral relations:
Posteriorly
◦ 1 Left sympathetic chain
◦ 2 Left renal artery
◦ 3 Left gonadal artery
◦ 4 Inferior mesenteric vein
To the right: Attachment of the
upper part of the root of the
mesentery
To the left
◦ 1 Left kidney and
◦ 2 Left ureter.
Anteriorly:
1 Transverse colon
2 Transverse mesocolon
3 Lesser sac
4 Stomach
Superiorly: Body of pancreas
23. Suspensory Muscle of Duodenum or Ligament of Treitz
◦ fibromuscular band which suspends and supports the duodenojejunal flexure.
◦ Arises from the right crus of the diaphragm, close to the right side of the oesophagus, passes downwards behind the
pancreas, and is attached to the posterior surface of the duodenojejunal and the third and fourth parts of the
duodenum
◦ It is made up of:
a. Striped muscle fibres in its upper part
b. b. Elastic fibres in its middle part
c. c. Smooth muscle fibres in its lower part
• Normally, its contraction increases the angle of the
duodenojejunal flexure. Sometimes it is attached only to the
flexure, and then its contraction may narrow the angle of the
flexure, causing partial obstruction of the gut.
24. Arterial Supply
◦ Duodenum develops partly from the foregut and partly from the midgut.
◦ Opening of the bile duct into the second part of the duodenum represents the junction of the foregut and the
midgut.
◦ Up to the level of the opening, the duodenum is supplied by the superior pancreaticoduodenal artery, and below
it by the inferior pancreaticoduodenal artery
★The first part of the duodenum receives additionalsupply from:
a. The right gastric artery.
b. The supraduodenal artery of Wilkie, which is
usually a branch of the common hepatic artery.
c. The retroduodenal branches of the gastroduodenal artery.
d. Some branches from the right gastroepiploic artery.
25. Venous Drainage
◦ The veins of the duodenum drain into the splenic, superior mesenteric and portal veins.
Lymphatic Drainage:
◦ lymph vessels from the duodenum end in the pancreaticoduodenal nodes present along the inside
of the curve of the duodenum, i.e. at the junction of the pancreas and the duodenum.
◦ Lymph passes partly to the hepatic nodes, and through them to the coeliac nodes; and partly to the
superior mesenteric nodes and ultimately via intestinal lymph trunk into the cisterna chyli.
◦ Some vessels from the first part of the duodenum drain into the pyloric nodes, and through them to
the hepatic nodes. All the lymph reaching the hepatic nodes drains into the coeliac nodes.
Nerve Supply:
◦ Sympathetic nerves from thoracic ninth and tenth spinal segments and parasympathetic nerves from
the vagus, pass through the coeliac plexus and reach the duodenum along its arteries.
26. Histology of Duodenum
◦ Mucous membrane shows evaginations in the
form of villi and invaginations to form crypts
of Lieberkühn.
◦ Lining of villi is of columnar cells with
microvilli.
Muscularis mucosae comprises two layers:
*Submucosa is full of mucus-secreting
Brunner’s glands.
◦ The muscularis externa comprises outer
longitudinal and inner circular layer of muscle
fibres.
◦ Outermost layer is mostly connective tissue.
27. CLINICAL ANATOMY
◦ • In the skiagram taken after giving a barium meal, the first part of the duodenum
is seen as a triangular shadow called the duodenal cap.
◦ First part of the duodenum commonest sites for peptic ulcer, because direct
exposure of this part to the acidic contents reaching it from the stomach.
◦ ulcer pain located at the right half of epigastrium is relieved by meals and
reappears on an empty stomach.
◦ First part of duodenum is overlapped by liver and gallbladder may become
ulcerated by a duodenal ulcer.
◦ Duodenal diverticula are fairly frequent. They are seen along its concave border,
generally at points where arteries enter the duodenal wall.
◦ Congenital stenosis and obstruction of the second part of the duodenum may
occur at the site of the opening of the bile duct. Other causes of obstrartion are:
a. An annular pancreas
b. Pressure by the superior mesenteric artery the third part of duodenum
c. Contraction of the suspensory muscle of the duodenum
28. JEJUNUM AND ILEUM
FEATURES:
◦ jejunum and ileum are suspended from the posterior abdominal wall by the mesentery therefore considerable
mobility.
◦ Jejunum begins at the duodenojejunal flexure.
◦ ileum terminates at the ileocaecal junction.
BLOOD SUPPLY:
◦ supplied by branches from the superior mesenteric artery.
◦ Drained by corresponding veins.
Lymphatic Drainage:
◦ Lymph from lacteals drains into plexuses in the wall of the gut. It passes into lymphatic vessels in the mesentery.
◦ Passing through numerous lymph nodes present in the mesentery, and along the superior mesenteric artery, it
ultimately drains into nodes present in front of the aorta at the origin of the superior mesenteric artery.
Nerve Supply:
Sympathetic nerves are from T9 to T11 spinal segments and parasympathetic nerve is from vagus.
32. MECKEL’S DIVERTICULUM (DIVERTICULUM ILEI)
◦ Meckel’s diverticulum is the persistent proximal part of the vitellointestinal duct.
◦ Present in the embryo, and normally disappears during the 6th week of intrauterine life.
Some points about MECKEL’S DIVERTICULUM:
1 It occurs in 2% subjects.
2 Usually, it is 2 inches or 5 cm long.
3 It is situated about 2 feet or 60 cm proximal to the
ileocaecal valve, attached to antimesenteric border
of the ileum.
4 Its calibre is equal to that of the ileum.
5 Its apex may be free or may be attached to the
umbilicus, to the mesentery, or to any other
abdominal structure by a fibrous band.
33. CLINICAL ANATOMY
◦Meckel’s diverticulum may cause intestinal obstruction.
◦Occasionally, it may have small regions of gastric
mucosa/pancreatic tissue.
◦Acute inflammation of the diverticulum may produce
symptoms that resemble those of appendicitis.
◦ It may be involved in other diseases similar to those of the
intestine.