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A+ BIOLOGY-IX, , STD-9-BIOLOGY-FIRST BELL-CLASS-15, Chapter – 3, , Simple Nutrients into cells, Blood vessels, There are three types of blood vessels, • Arteries • Veins •. Capillaries, Arteries, , They carry blood from the heart., Veins, , They carry blood to the heart., Capillaries, , Connects veins and arteries, , , , Arteries split into small arteries and they in turn split into capillaries. The capillaries unite to form, small veins and these smaller veins unite to form larger veins., Indicators, Arteries, Veins, Capillaries, Peculiarity of the wall Thick and elastic walls Thin wall, Formed of a single layer of, cells. Minute pores on the, walls., Valves, Absent, Present, Absent, Peculiarity of blood High speed and high, Low speed and low pressure. Low speed and low pressure., flow, pressure, Direction of blood, From heart to the To the heart from different From arteries to veins., flow, different parts of the parts of the body., body, A+ BLOG-www.apluseducare.blogspot.com 9072708051, , Page 1