Pinnate Venation: The veins extend from the midrib to the leaf margin. Oak and cherry tree leaves have pinnate venation. Palmate Venation: The veins radiate in a fan shape from the leaf petiole.

Some conditions, considered idiopathic or of only partially known etiology, may have an anatomic basis. Among such conditions are possibly certain postural or orthostatic syndromes related to the ...

In chronic venous insufficiency, veins of the lower limbs are unable to transport blood towards the heart. It might be caused by genetic factors, may occur after trauma, or may result from a blood ...