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Celiac Trunk
- Divides into:
- Common hepatic (supplies livier and R stomach)
- L gastric (supplies L stomach)
- Splenic (supplies spleen)
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Superior Mesenteric a.
Supplies: all of small intestines; proximal 2/3 of large intestines (ascending and transverse colon); pancreas
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Inferior Mesenteric a.
Supplies: distal 1/3 of large intestine (descending and sigmoid colon, rectum)
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Veins of unpaired arteries drain into...
Portal system
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Veins of paired arteries drain into...
caval system
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Hepatic portal v.
Carries blood from unpaired veins (mostly digestive organs) to the liver
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Hepatic v.
drains liver into IVC
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Right Coronary a. (RCA)
- Course: down R AV sulcus
- Serves: R atrium; SA and AV nodes; posterior part of IVS
- Anastomoses: circumflex and LAD
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SA nodal
- Course: from RCA near origin up to SA node
- Serves: SA node; pulmonary trunk
- Anastomoses: none
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R marginal (acute)
- Course: from RCA along inferior margin of heart to apex
- Serves: R ventricle and apex of heart
- Anastomoses: IV branches
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Posterior Interventricular
- Course: from RCA (at crux of heart) down posterior IV groove to apex
- Serves: R and L ventricles; posterior third of IVS
- Anastomoses: anterior IV branch of LCA
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AV nodal
- Course: RCA near origin of posterior IV a. to AV node
- Serves: AV node (at crux of heart)
- Anastomoses: none
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Left Coronary a. (LCA)
- Course: L AV groove, gives off anterior IV and circumflex branches
- Serves: most of L atrium and ventricle; IVS and AV bundles; may supply AV node
- Anastomoses: RCA
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Anterior interventricular/L anterior descending (LAD)
- Course: from LCA down anterior IV groove to apex
- Serves: R and L ventricles; anterior two thirds of IVS
- Anastomoses: Posterior IV branch of RCA
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Circumflex branch
- Course: LCA to L AV sulcus to posterior surface of heart, stops at crus of heart
- Serves: L atrium and ventricle
- Anastomoses: RCA
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L marginal (obtuse)
- Course: from circumflex branch down L margin of heart
- Serves: L ventricle
- Anastomoses: IV branches
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Great cardiac v.
runs with the LAD, then posterior with circumflex merging into coronary sinus
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Middle cardiac v.
runs with the posterior interventricular a.
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small cardiac v.
runs with acute marginal and then posterior with RCA
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coronary sinus
on posterior aspect of heart, drains into R atrium
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L marginal v.
runs with obtuse marginal a.
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L posterior ventricular vein
on back side of L ventricle between middle cardiac v. and L marginal v.
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anterior cardiac vv.
drain R atrium directly into R atrium
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Azygos
drains into SVC; drains posterior thoracic wall (R directly, L via hemiazygos [lower] and accessory hemiazygos [upper])
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Branches of thoracic aorta:
- brachiocephalic trunk
- L common carotid a.
- L subclavian a.
- posterior intercostal a.
- esophageal a.
- bronchial a.
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Internal thoracic a.
branches off subclavian a. - is inside thorax but outside pleura; gives rise to anterior intercostals. Splits into superior epigastric and musculophrenic
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Branches of external carotid a.
- Some Angry Lady Figured Out PMS
- superior thyroid
- ascending pharyngeal
- lingual
- facial
- occipital
- posterior auricular
- maxillary
- superficial temporal
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Superior thyroid a.
- supplies:
- thyroid
- larynx
- thyroid gland
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Ascending pharyngeal a.
supplies: nasopharynx
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Lingual a.
Supplies: muscles of tongue
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Facial a.
- Only a. that crosses over mandible; anterior to masseter
- Supplies:
- most muscles of face
- platysma
- face below eyes
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Occipital a.
Crosses SCM to supply back of head
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Posterior Auricular a.
- Superior to posterior belly of digastric
- Supplies: posterior to auricular
-
Maxillary a.
- "Deep facial"
- Deep to mandible
- Supplies: muscles of mastication; TMJ; mylohyoid
- source of middle meningeal a.
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Superficial temporal a.
Supplies: lateral face
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Branches of Subclavian a.
- vertebral
- internal thoracic
- thyrocervical trunk
- costocervical
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Vertebral a.
- branch of subclavian a., travels posteriorly and superiorly to enter transverse foramen at C6, crosses groove on C1 and into foramen magnum.
- Supplies: brain
-
Superior Epigastric a.
- Branch of internal thoracic a., goes down abdominal wall
- Supplies: anterior abdominal wall
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Musculophrenic a.
- Branch of internal thoracic., goes around ribcage.
- Supplies: lateral abdominal wall
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Thyrocervical trunk
- Divides into:
- Suprscapular - supplies muscles of RC
- Transverse cervical - superficial: supplies middle and posterior scalenes; trapezius. Deep: supplies dorsal scapular a.
- Inferior thyroid - supplies thyroid
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Costocervical Trunk
Supplies: first rib; prevertebral mm.
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Internal Jugular v.
- Descends in carotid sheath.
- Drains: brain
-
External jugular v.
- Goes over SCM
- Drains: face
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Anterior jugular v.
- Runs up anterior neck - variable
- Drains: face and neck
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Facial veins...
do not have valves
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Danger triangle of face
- Bridge of nose down to corners of mouth
- many veins in this area drain into brain --> increased risk of infection to brain
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