Download MBBS (Bachelor of Medicine, Bachelor of Surgery) Human Anatomy ppt lectures Topic 68 Pancreas Notes. - anatomy ppt free download human anatomy ppt lectures, medicine notes ppt, anatomy handwritten notes pdf, mbbs 1st year anatomy notes pdf download, best anatomy notes pdf, human anatomy notes pdf, anatomy easy notes pdf, anatomy notes online, anatomy short notes, Anatomy ppt, Powerpoint Presentations and lecture notes.
Pancreas- Brief History
Herophilus, Greek surgeon first described
pancreas.
Wirsung discovered the pancreatic duct in 1642.
Pancreas as a secretory gland was investigated
by Graaf in 1671.
R. Fitz established pancreatitis as a disease in
1889.
Whipple performed the first pancreatico-
duodenectomy in 1935 and refined it in 1940.
Pancreas
Pancreas
Gland with both exocrine and endocrine functions
15-20 cm long, 2.5-3.8 cm broad, & 1.2-1.8 cm thick.
60-100 gram in weight
Location: retro-peritoneum*, 2nd lumbar vertebral
level
Extends in an oblique, transverse position
Parts of pancreas: head, neck, body and tail
LOCATION
Head of Pancreas
Enlarged flattened right end of pancreas,
situated with in the curve of the duodenum.
External features-
3 borders- sup.,inf. & rt.lat.
2 surfaces- ant. & post.
1 process
RELATIONS-
Sup border ? overlapped by 1st part of duodenum
& is related to SPDA
Inf. Border- 3rd part of duodenum & IPDA.
Rt. Lat. Border- 2nd part duodenum, terminal part of
bile duct & anastomosis between 2 pan.art.
Two surfaces-
Ant. Suf- gastroduodenal a.
transverse colon
jejunum sep. frm it by peritoneum.
Post. Suf- IVC, Terminal part of Renal veins
Rt. Crus of diaphragm & bile duct.
Uncinate proc.- Ant.- SMA
Post.- Aorta.
Dr.
HEAD OF THE PANCREAS & Its
Ravi
relations.
Anterior
Relations
Posterior
Relations
Neck of Pancreas
2.5 cm in length, constricted part bet. Head & Body.
2 surfaces ? Ant. & Post.
Ant. ? peritoneum covering post.wall of lesser sac &
pylorus
Post.- termination of SMV and splenic vein
confluence to form portal vein
Pancreas
Body of Pancreas
Elongated, long structure Extends from neck to tail
Triangular on cross section
3 borders- ant.,sup., & inf.
Tuber omentale
Relations-
Ant. Border- root of transeverse mesocolon
Sup. Border- coeliac trunk, hepatic a.(r) & splenic a(l)
Inf. Border- sup. Mesent. Vessesls.
Ant. Suf.- covered by peritoneum &
related to lesser sac & to stomach
Post. suf.- devoid of peritoneum
related to aorta, lt. adrenal gland,
lt. renal vessels and upper 1/3rd of lt. kidney,
lt. crus of diaphragm & Splenic vein
Inf. suf.-covered by peritoneum &
related to DJ flexure, coils of jejunum & lt.
colic flexure
Tail of Pancreas
Narrow, lt. end of pancreas
Lies at the level of 12th thoracic vertebra
Ends within the splenic hilum
Lies in the lienorenal ligament
Anteriorly, related to splenic flexure of colon
May be injured during splenectomy (fistula)
Pancreatic Duct
Main duct (Wirsung) runs the entire length of
pancreas
Joins CBD at the ampulla of Vater
2 ? 4 mm in diameter, 20 secondary branches
Ductal pressure is 15 ? 30 mm Hg (vs. 7 ? 17 in CBD)
thus preventing damage to panc. duct
Lesser duct (Santorini) drains superior portion of head
and empties separately into 2nd portion of duodenum
Arterial Supply of Pancreas
Variety of major arterial sources (celiac, SMA and
splenic)
Mainly pancreatic br. Of Splenic a.
Superior pancreaticoduodenal a.
Inferior pancreaticoduodenal a.
Arterial Supply of Pancreas
Venous Drainage of Pancreas
Follows arterial supply
Drain into- splenic, superior mesenteric
Ultimately, into portal vein
Venous Drainage of Pancreas
Lymphatic Drainage
Lymphatics follows the arteries
Drain into pancreaticosplenic, coeliac & superior
mesenteric group of lymph nodes.
28
Innervation of Pancreas
Sympathetic fibers from the splanchnic nerves
Parasympathetic fibers from the vagus
Both give rise to intrapancreatic periacinar plexuses
Parasympathetic fibers stimulate both exocrine and
endocrine secretion
Sympathetic fibers have a predominantly inhibitory
effect
This post was last modified on 05 April 2022