Choose a historic steam train or one of our eco-friendly biodiesel locomotives for your train ride on the only Cog Railway East of the Rockies! Advance booking is recommended. Check our train schedule here. Download Cog RW Brochure [1.32 MB pdf]
There are two types of blood vessels in the circulatory system of the body: arteries that carry oxygenated blood from the heart to various parts of the body and veins that carry blood towards the heart for purification.hey are tiny branches of arteries that lead to capillaries and help maintain the pressure and blood flow in the body. Venous valves prevent blood from flowing in the opposite direction. Connective tissues make up the outermost layer of a vein which is also known as-tunica adventitia or tunica externa.
(Their diameter is 5 to 10  micrometers, or 5 to 10 millionths of a meter.) Capillaries connect  arterioles and venules, which are the smaller extensions of the  larger arteries and veins. the smallest blood vessels in the body branched off from arteries.A capilary is a small artery. Capillaries are the very small vessels that send blood from arteries to veins in the body. 2  More active organs and tissues have more capillary networks. 3  Unlike veins and arterâ¦.