Lecture 21: Circulatory System-Venous Drainage Flashcards
where are superficial veins of brain collected?
dural sinus (venous channels btw tow layers of cranial dura mater)
where are deep veins of brain collected
great cerebral vein that drains into straight sinus
what does sigmoid sinus become as it crosses the jugular foramen
internal jugular vein
what are anterior and external jugular veins
superficial
receive venous blood of posterior scalp, neck. drain into subclavian vein
where does opthalmic vein drain
cavernous sinus. very deep
do venous sinuses have valveS?
no
vena comitans
“accompanying vein”
for an artery there is usually a pair of accompanying veins
are there superficial arteries?
no
- right subclavian
- right axillary
- right radial
- right brachial
- right ulnar
what are the 3 superficial veins of upper limb
- cephalic- btw deltoid and pectoral
- basilic- drains into axillary or subclavian and returns via SVC
- cubital- forearm
- R subclavian
- R axillary
- cephalic
- basilic
- median cubital
A
- femoral
- great saphenous
- anterior tibial
- posterior tibial
- fibular
- small saphenous
- popliteal
- small saphenous
where do deep veins of lower limb drain to
femoral vein (except gluteal region drain into internal iliac)
where does the great saphenous veni drain into
femoral
what does femoral vein become after passing deep to inguinal ligament
external iliac vein
what are the superficial veins of lower limb
great and small saphenous
what are deep veins of lower limbs
anterior/posterior tibial, fibular, popliteal, femoral
what does small saphenous vein drain into
popliteal. rnus laterally and posterioyl
what does great saphenous drain into
femoral. ascends medially
- SVC
- IVC
are veins equal on both sides?
no.
The ones on Right side are shorter
The ones on left side are longer because they have to cross midline to get to vena cavas
what forms the SVC
L and R brachipcephalic veins.
- brachiocephalic
- subclavian
- internal jugular
- posterior intercostal
- azygos
- accessory hemiazygos
4.hemiazygos
are azygos and hemiazygos paired?
NO
azygos-right side. drains in SVC
hemiazygos-L side
accessory hemiazygos-L side
what drains throacic wall
anterior and posterior intercostal veins
ant. empty into brachiocephalic
post. empty into azygus on right side, or accessory hemiazygus/hemiazygus on left
what forms the IVC
unions L and R common iliac veins
- hepatic
- renal
- gonadal
- IVC
- L common iliac
- L internal iliac
- L external ilic
- L femoral
explain hepatic portal circulation
Venous blood returning from the alimentary canal below diaphragm is rich in nutrients, delivered to liver for processing. Venous blood of liver empties into inferior vena cava through hepatic veins
Hepatic portal vein transports venous blood from abdominal esophagus, stomach, intestines, pancreas, spleen to the liver. Vein is formed by union of superior mesenteric and splenic veins behind pancreas
explain liver blood supply
DUAL! hepatic artery and venous drainage thru portal system
superior mesenteric
collects venous blood from small intestine, cecum, appendix, ascending, transverse colon
jejunal/ileal/ileocoli/right/middle colic all drain into superior mesenteric
inferior mesenteric
collects venous blood of splenic flexure, descending, sigmoid colon, rectum.
superior rectal, sigmoidal, left colic form inferior mesenteric
drain into IVC
splenic vein
forms at hilum of spleen. receives venous blood from stomach/pancrease AND inferior mesenteric.
- hepatic portal
- superior mesenteric
- splenic
- inferior mesenteric
