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UT / Biology / EEB 240 / What is the abdominal bone called?

What is the abdominal bone called?

What is the abdominal bone called?



What is the abdominal bone called?






Vocab umbilicus external as obliques rectus sheath

gunel ligament internal ab obliques cectos abe muscles


Notes Skeleton of abdomen

-almost no bony wall surconding it lo Viscera Location

- liver deep to false ribs 2. Wall Divisions

Why are veins superficial to arteries?

- ab wall is protection of abdomen

- 3 layers of abdomenal muscles THEN transverse & sagittal

L umbilicus plane #sanetimes split 04 (quadrants into a sections

Tilia, blade-like bare around pelvis (the "v" 3. Superficial Wall

What passes through the inguinal canal?

Don't forget about the age old question of How lawyers can get paid?

-blad vessels (maidy veins 4. Will Muscles

- can see individual muscles (thicker)

easier to see - first muscle is extemal abdominal obliques

Samne course as external intercostal

~ aponeuros's (rectos sheath ): deep is rectus alodaninous muscles

-ingurired ligamenti from pubis te the iliacere

~ all ab: muscles the into this

- deep to external abd. obliques are internal abodo oblices difference in musde orientation ) Don't forget about the age old question of Why do we need to justify things?

Raponeurosis formedlwhite in slide) sectos ab. muscles are "8-packs' We also discuss several other topics like What are gatekeepers?

ndeep to aponeurosis e "bellies" n they have tendens btw each


1 Topics

Notes Vocab

transversus ab. Musle mostly behind rectos abdominis mosde nsverse ab merele

rappenercsis is deep to evate line We also discuss several other topics like When did the first african arrive in america?

arcuate line i appenerosis is anterior toi Fetal pertaveun rest is posterio: to recte's only superior to arcuate line


deep to everything else is the facia ermatic cod

- parietal pen toneem. tissue layer against aber well master muscle

- forin innermost layer Cdeepest most posterior) s deferens

cial Vessels

-muscles are confiscation of thorax If you want to learn more check out How much faith do you have in the executive branch?

einfermeil thoracic artery de vein rso now epigastric artery a vein

a) rectus abe covers this

licker Q

Extension of aternad oblique

I Portion of small intestine most proximal to stomach is. If you want to learn more check out What does the law of conservation of energy state?

duodenom Inguinal Canal (males ]

- External oblique forms "20f" over Ceindd 1. Spermatic Cord (round ligament in females ]

forms testes, enter canal to attach to structures inside abdomen t ) cremaster muscelmoles) inger I goods in males external blc .

of sperm production Coutside of body is cooler than inside )*

? 2. Transversus Abdominis

- alongside exit point of conal 3: Vas Deferens in

- tobe that carries sperm




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Study Son

Vocab scrotum hernias indirect)) direct , continus cavity



visceral peritorum intraperitoneal organ retroperitoned organ

Notes Scroton

call different layers of abdomen wall have equal layers found in wall of scrotum ble testes begin in abdomen (travel through inguinal canal) Hernias

- very common in ingwind canal

done fissue that özjects into anether tissue 1. Indirect

- intestine goes through ingonal canal

-happens blic of development avec 2. Direct part of inguinal canal

da intestine goes through abdominal wall; sonetin

a Abdominal Cavity

- continuous cavity, abdu cavity & pelvic cavity

1. Peritoneum

name we give fortissue of ab, cavity

- ab cavity contains "balloor" (peritoneum) land do organs push or balloon from outside

- arteries/veins/nerves travel through two layers of peritoneum Scall in mortesterydouble fold of peritorem for

-Visceral peritoneum. covers organ L -introperitare ed organ: completely webin peritoneum

retroperitoneal orgon, only covered on one side mainly ble against posterior of peritorum space

~ pancreas, pelvis, etc

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2. Great Omentum

first thing you see (double folded peritoneum)

yellow, bangs down like apron Caround intestines)

- around ab. Cavity tries to close off inflamation in cavity by inflaming itself

0-Bangs off fransverse colon; contains blood vessels & nerves (autonomic nerves)

- large intestine just deep of this *ligaments in ab & pelvic cavity connect organ to organ, not hoone to bone *

3. Omental Hursa

- posterior to stomach, small sac sostomach can expand

- btw lesser omentum & gastrocolic ligament es die 4. Stomach (big, muscular săc) a s p

- goes into small intestine

a T pundus - esophagus travels through @ an angle ble it closes mores more as stomach pylon's

Do sphincter . pylonic sphincter, muscular, ring inside all walls of stanach, closed/contract when digesting at relaxed lepen when not

autonomic blc smooth muscle 5. Omental Bursa

- first part of small intestine (where stomach neutralizes) - pancreas just deep of this -duodenom relation to liver

to a liver produces bile -relation to pancreas

- helps digest, break to carlos proteins/etc

Le b




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6. Pancreas

- "The King" - produce endocrine and esocrine hormones

resocrine: digestion, released into duodenum

mendocrine, gland release into blood stream (insulin, regulates blood sugar -> Diabetes )

7. Liver

- "The Queen" - helps us package substances absorbed by intestines (alcohol, etc)

- reorganize substances, regulate blood liron, etc) *all blood through veins from all abdomen organs go through liver before the heart *. .. every thing covered by peritineam except bare area libe X D left lobe lest of bare

L o nelader falciform

a recognit) Cisferior) Canterior) 1 portacants gallbladder





-porta hepatis, gate of liver, drawing blood into liver

- gall bladder! holds extra bile, seperates right lobe from quadrate lobe

- liver can regenerate

left & right bile ducts join up w/ pancreas

form Common Bile Duct & Small and a "cystic duct from bile duct to gallbladder

Intesting too Duodenum

-smallest portion of small intestine

where absorption, begins chemical break down happens in stomach, then goes to here (end of chenical break down)


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9. Jejumm & I leum

Giewoun, more superior - hesentery's, from posterior wall d surrounds jejunum

wall blood vessels that supply take away blood from small intestine located in between layers

:-Differences between Jejunumland Ileum:

Je unum -more folds Icloser together | beginning of where intestines

implicae circulares, increase start to ABSORB water surface area

Falot of arterial loops f - Greater Surface area

- not as many folds -absorbs nutrients

-vasa rectae shorterble) -vesa rectae longer connect arterial loops to intestine

Large Intestine

not as

tional tasks as small intestine 1. Functions

ont formation labsorption of some vitamins (gut, megtly)

- eles con fluid water out of food (turns into feces


Colon 1. Lecum melding tank

by this

holding tank, after food It water absorption

moved by muscles - mesocdoni mesentery of large intestine ; suspended appendix: hangs off here; not sure what it does the may be a resevoir where good bacteria colonizes

descending suspended

colon) by mesocolon






from stomach


2. Features. Flexure

* Left Colic UND *

- blood supply to intestine, blood not provided by same arterial source the small intestine & part of large provided

Sebens of development)

- located on left side posterior, around 9-11th rib

- involved with homeostasis of blood

- sometimes impressions of ribs on the spleen Chilium is root of spleen) Clicker Question ,

the right kidney is located more inferior than the left kidney Ible of the presence ofera the LIVER Retreparitoneal Organs

- kichen surrounded by fat Chelps protect) 1. Kidney

- diaphragm deep & superior - bean shaped - convex side, no structures entering or exiting - Concave side. renal artery & vein exter&exit here

THE Vein is anteric to artery






- pancreas overlapping left kidney on left side - Ureteri carries where towards bladder - capsule is very thin

cortex. Seperates medulla, - major calyx" meeting point of minor calyx (posterior)






Arterial Blood Flow]

aorta - everything with arteries starts w/ hod to descending acrta, to diaphragm

1. Celiac Trunk a

first major artery to emerge from ascending aorta after getting through diaphragm

☺ -after that comes superior mesenten'c artery: supply blood to all small intestines & large intestines, up to left colic flexure

☺-next is inferior mesenteric artery (supply blood to rest of organs in body ) .

29 -gonada ortadessupply blood to ovaries/testes, emerge around superior mesenteric artery (fron aortas

Summary of Arterial Blood Flow Celiac Trunk

Superior Artery, -stomach

- Pancreas (part) -liver

-duodenum (distal) - gall bladder

-jejunum - spleen

ileum -duodenum


- vermiform appendix -Greater omentum - ascending / transverse colon

Inferior Artery -descending Colon - sigmoid colon - rectum

* underlined words are things that DO the supplying *



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