(a)++Heart+structure

=__**a) Heart Structure**__=


 * 1) Draw a good clear diagram to show the layout of the heart. Include relative wall thicknesses and all names.
 * 2) Lawl

2) Draw a diagram to show the main blood vessels entering & leaving the heart lawl

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3. What is a valve, & what is its job? Draw a diagram to show the location of the main valves. ====Valves are flaps of tissue without muscle. Valves are opened and closed by the flow of blood. The job of a value is to ensure the blood is always flowing in the correct direction; as long as the blood flows in the right direction, the valves remain pushed open, and if the blood starts flowing in the wrong direction they are pushed shut. The valves have some strings of connective tissue attached to them, which prevents them from opening to the wrong side.==== (4)Describe what each of the 4 chambers of the heart does.
 * Each of the 4 chambers are split into two parts: two atrium (atria) and two ventricles.
 * The thicker the wall of the chambers, the more pressure it can be put on the blood, and the farther it can be pumped.
 * The atria put pressure on the blood that flows through in order to push it into the ventricles, which are right next to them. This is why they have thin walls.
 * The right atria collects blood from the body
 * The left atria collects blood from the lungs
 * The left ventricle pumps blood around the entire body (so it has a very thick wall)
 * The right ventricle pumps blood into the lungs (has thicker wall than the atria but not as thick as the left ventricle)