If you are referring to "vein" as found in human anatomy, the word is "venous". This is sometimes confused with the word "venial" which is a sin. Meanings are as follows:
VENOUS Full of or characterised by veins; veiny.
VENIAL Not serious, forgivable. Less than mortal.
As distinct from Arterial or Capillary.
Because they carry veinous blood.
Arteries. There's only two- the aorta and the pulmonary artery, which carries veinous blood.
Red. All blood is actually red it is just the darker redness combined with skin pigments that make veinous blood appear blue.
Prazosin blocks alpha-1 receptors (post synaptic) reversibly, permitting vasodilation of both resistance (arterial) and capacitance (veinous) vessels.
Best I could do I guess
The fetal circulation is based mainly on the veinous circulation during pregnancy. Once the uterine connections are lost, the adult circulation takes over.
The deoxygenated blood leaves the brain via the dural sinuses. These are large veinous structures located in the dura mater that connect with the internal jugular vein.
The meaning behind darker blood varies depending on where the blood is coming from: Darker blood from menstruation could mean that the blood is old because periods are not regular. Dark blood from your veins could mean something like you have too much iron in your blood. Veinous blood as well as fresh menstrual blood should always be bright to deep red, not burgundy or black. If blood is dark you should have it checked out by a doctor.
Right is crescentic in shape, has bold trabecullae carnae at inflowing part and infudibulum at the exit. Pumps veinous blood. Left has conical shape, thick walled, with finer trabecullae and aortic vestibule at exit. It pumps arterial blood.
Yeah there is a pressure point on your wrist, it is between the wrist bone and the tendon farthest away from it.
you find non return valves inside the heart, lymph and veines, avoiding fluids from flowing backwards > [veinous blood in veines and heart, oxygenated blood in the heart]. Lymph vessels have valves also. The portal vein though contains no valves. All arteries including arteriols and capillaries have no valves.
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern V-I-OU-. That is, seven letter words with 1st letter V and 3rd letter I and 5th letter O and 6th letter U. In alphabetical order, they are: veinous