Anatomy and Cell Biology 3319 Lecture Notes - Lecture 34: Superior Mesenteric Artery, Inferior Mesenteric Artery, Superior Vena Cava
1 May 2018
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Lecture 034: Systemic Circulation - Major Arteries and Veins
Major Arteries and Veins Objectives
● Describe the major branches of the thoracic and abdominal aorta
● Describe the arterial blood supply to the lower limb
● Describe 6 locations at take a pulse which arteries are superficial enough to
● Compare and contrast the arterial and venous supplies to the upper and lower limb
● Describe the formation of the superior vena cava
● Describe the hepatic portal system
Major Branches of the Thoracic Aorta
● Bronchial branches
○ 2-3 branches
○ Goes to the lungs
● Esophageal branches
○ 2-3 branches
○ Esophageal runs parallel to the aorta
● Posterior intercostal arteries (9)
○ Contributes to the circuit of arteries underneath the ribs (3-11)
● Pericardial branches
○ Provide blood to the pericardial sac
● Superior phrenic branches
○ Provides blood to the diaphragm
○ 2 -3 branches
● Subcostal artery
○ Runs underneath the 12th rub (not really intercostal)
● Note:
○ First 2 ribs are too high to get blood from the aorta
○ Get blood from the costocervical artery
Aorta penetrates the diaphragm at the aortic Hiatus
● At T12
● Esophageal at T10
● Vena cava at T8
Major Branches of the Abdominal Aorta (3 SINGLE branches)
● Celiac trunk
○ Short
○ Immediate give rise to a bunch of branches
■ Feeds the liver, pancreas, duodenum (digestive system)
● Superior mesenteric artery
○ Provide blood to all of the small intestine and a portion of the large intestine
● Inferior mesenteric artery
● Provide blood to all of the large intestine and colon
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Document Summary
Lecture 034: systemic circulation - major arteries and veins. Describe the major branches of the thoracic and abdominal aorta. Describe the arterial blood supply to the lower limb. Describe 6 locations at take a pulse which arteries are superficial enough to. Compare and contrast the arterial and venous supplies to the upper and lower limb. Describe the formation of the superior vena cava. Contributes to the circuit of arteries underneath the ribs (3-11) Runs underneath the 12th rub (not really intercostal) First 2 ribs are too high to get blood from the aorta. Aorta penetrates the diaphragm at the aortic hiatus. Major branches of the abdominal aorta (3 single branches) Immediate give rise to a bunch of branches. Feeds the liver, pancreas, duodenum (digestive system) Provide blood to all of the small intestine and a portion of the large intestine. Provide blood to all of the large intestine and colon. Around the level of of superior mesenteric artery.
