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Anat-Veins

QuestionAnswer
components of capillary network arterial and venous capillaries
venules function drain the capillary network, counterpart of arterioles
flow of blood through all blood vessels elastic arteries--> muscular arteries--> arterioles--> arterial capillaries--> venous capillaries--> venules--> small veins--> medium veins--> large veins
vein valves location/function found in medium-sized veins (especially of the lower limbs) and allow blood to flow toward the heart but not in the opposite direction
systemic veins function return blood from the body to the right atrium
major systemic veins coronary sinus, superior vena cava, inferior vena cava
coronary sinus function collects blood from cardiac muscle cells and returns it to the right atrium
superior vena cava function transports blood from the head, neck, thorax, and upper limbs (what's superior to the heart) to the right atrium
inferior vena cava function transports blood from the abdomen, pelvis, and lower limbs to the right atrium
three types of veins superficial, deep, sinuses
superficial veins location/naming found closer to the surface of the body (close to the skin), have "unique" names
deep veins location/naming typically found deeper in the body and usually next to major arteries, typically share names with arteries
sinuses structure kind of like a storage vein; a modified, slightly expanded diameter vein that lacks smooth muscle (diameter usually controlled by smooth muscle, therefore, sinuses can't change diameter)
great and small cardiac veins function drain the left (great) and right (small) side of the heart
coronary sinus function/location collects venous blood from the great and small cardiac veins and empties into the right atrium; very close to the right atrium
veins that empty into the superior vena cava dural venous sinuses, internal jugular vein, external jugular vein, subclavian vein, vertebral veins, brachiocephalic vein, radial vein, ulnar vein, brachial vein, basilic vein, axillary vein, cephalic vein
dural venous sinuses function/location receive blood that has circulated through the brain, face, and orbit and empty into the internal jugular vein; quite a number of them, found in the cavity space within the dura mater that is filled with blood
internal jugular vein location exits skull through the jugular foramen between the temporal and occipital bones, connects to the subclavian vein and dural venous sinuses
internal jugular vein function carries blood out of the skull and down the neck
vertebral veins location travel with the vertebral arteries through the transverse foramina of the cervical vertebrae and join the subclavian vein
vertebral veins function drain the cervical vertebrae, spinal cord, and deep neck muscles
formation of brachiocephalic vein subclavian veins become the brachiocephalic veins after they pass the clavicle
formation of the superior vena cava right and left brachiocephalic veins fuse to form the superior vena cava
deep veins of the shoulder and upper limb axillary, subclavian, radial, ulnar, and brachial veins
superficial veins of the shoulder and upper limb basilic and cephalic veins
radial vein location paired, found next to the radial artery
ulnar vein location paired, found next to the ulnar artery
brachial vein location/formation connects with the axillary vein, made from the connection of the radial and ulnar veins
basilic vein location on the medial side of the arm, becomes the axillary vein by joining with the brachial vein
cephalic vein location on the lateral side of the brachial body part, connects right before the subclavian vein begins
axillary vein location in the axillary region, becomes the subclavian vein beneath the clavicle
inferior vena cava location goes from the right atrium, through the diaphragm, and to the bottom of the abdominal cavity; runs side-by-side with the descending abdominal aorta (on its right)
inferior vena cava structure thinner wall than descending abdominal aorta, cross section tends to collapse if there is no blood in it
inferior vena cava immediate branches branches to form the right and left common iliac veins, left and right renal veins also branch off
hepatic portal system route capillaries in the abdominal viscera--> venule--> small, medium, large veins--> hepatic portal vein--> medium, small veins--> venules--> capillaries in the liver; heart is not a direct part of the system!
hepatic portal system function brings nutrient-filled blood from the digestive system to the liver to be stored, balanced, and detoxified before it goes to the rest of the body
deep veins of the pelvis and lower limb anterior and posterior tibial veins, popliteal vein, femoral vein, external iliac vein, internal iliac vein, common iliac vein
branches of the common iliac vein external and internal iliac veins
branch of the external iliac vein becomes the femoral vein in the thigh
branch of the femoral vein becomes the popliteal vein
branches of the popliteal vein anterior and posterior tibial veins
superficial veins of the pelvis and lower limb great saphenous vein
great saphenous vein location/structure on the medial side of the leg; longest vein in the human body
valves location/necessity found in both superficial and deep veins (esp of the leg); important in the leg because blood pressure is low here and blood flow must work against gravity
action of skeletal muscle pump in deep veins surrounded by skeletal muscle so contraction and relaxation of skeletal muscles during activity squeeze the veins and push the blood upwards
action of valves in deep veins keep the blood from "falling back down" when the muscles of the skeletal muscle pump relax
problems with valves of the veins in the leg weight gain or standing around a lot (pressure on limb tissue) causes blood vessel walls to expand so valves can't close properly, blood pools and leads to varicose veins
external jugular vein location drains into the subclavian vein
veins of the hepatic portal system hepatic portal vein, superior mesenteric vein, inferior mesenteric vein, splenic vein, gastric vein
superior mesenteric vein function drains blood from the small intestine and part of the large intestine
inferior mesenteric vein function drains the distal part of the large intestine and usually drains into the splenic vein
splenic vein function drains the spleen
gastric veins function drain the stomach??
Created by: Jean-O