Each 2.54 square centimetre (a square inch) of human skin has six metres (20ft) of blood vessels. Veins hold about 65 per cent of the body's blood and have one-way valves tohelp blood move.

Inequalities are the relationships between two expressions which are not equal to one another. The symbols used for inequalities are <, >, ≤, ≥. \(7 \textgreater x\) reads as '7 is greater ...

Since blood is about 90% water, dehydration can reduce blood volume and cause blood vessels to narrow, raising blood pressure. Chronic dehydration may worsen high blood pressure, while drinking too ...

The aorta is the largest blood vessel in the body, carrying oxygen-rich blood from the heart to every organ and tissue. It begins at the left ventricle, extends upward through the chest to form an ...

The convention defines the territorial limits a country can claim and whether a vessel is under the laws of its Flag State or also those of the state whose waters it is lying in. Vessels are free to ...