Best Answer: It extracts the chlorophyll so that when you test for strach with iodine the colour change is clear. when u boil a leaf in alcohol, it's chlorophyll dissolves in alcohol, leaving the leaf colourless. now when u test for starch by adding Iodine the colour change in clear. BlueAsh Â· 7 years ago.
Left atrioventricular valve (Mitral valve). The mitral valve is located within the heart. It lies between the left atrium and the left ventricle. The mitral valve opens to increased pressure as the left atrium fills with blood.Blood flows through into the left ventricle as the heart expands (diastole).It then closes as the heart contracts (systole) and forces blood into the aorta.t lies between the left atrium and the left ventricle. The mitral valve opens to increased pressure as the left atrium fills with blood. Blood flows through into the left ventricle as the heart expands (diastole). It then closes as the heart contracts (systole) and forces blood into the aorta.
The valves located between the upper and lower chambers of the heart are known as the atrioventricular valves. On the right side, it is known as the tricuspid valve because it â¦ has three flaps. On the left side, it is known as the bicuspid or mitral valve because it has two flaps. 1 person found this useful. Answered.