A little exercise never hurt anyoneâand it may even release some endorphins to boost that post-hangover mood. Differential effects of acute and regular physical exercise on cognition and affect. Hopkins ME, Davis FC, Vantieghem MR.
Vein Types. Veins can be categorized into four main types: pulmonary, systemic, superficial, and deep veins. Pulmonary veins carry oxygenated blood from the lungs to the left atrium of the heart. Systemic veins return oxygen-depleted blood from the rest of the body to the right atrium of the heart. Superficial veins are located close to the surface of the skin and are not located near a corresponding artery.
The following diagram summarises the sequence of blood flow through the heart, arteries, arterioles, capillaries, venules, veins, then back to the heart: The following diagram summarises the structural differences between different types of blood vessels.More information about this also follows in the next section.enules. Venules are minute vessels that drain blood from capillaries and into veins. Many venules unite to form a vein. 1  Drains blood from capillaries into veins, for return to the heart.