ICSE Class 10 Answered
(a) Why heart is divided into two parts by a muscular wall? (b) Why veins have valves?
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
Expert Answer
(a) Heart is divided into two parts by a muscular wall so as to separate oxygenated blood from deoxygenated blood. The right side of the heart deals with deoxygenated blood and the left side of the heart deals with the oxygenated blood.
(b) Veins have valves to prevent back flow of the blood because in veins blood flows at a very slow speed.
Most of the veins carry blood against the force of gravity.
(b) Veins have valves to prevent back flow of the blood because in veins blood flows at a very slow speed.
Most of the veins carry blood against the force of gravity.
Answered by | 04 Jun, 2014, 03:23: PM
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