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 bicuspid, or mitral valve (also called the left atrioventricular valve), is located between the left atrium and left ventricle.It prevents any backward flow of blood duri â¦ ng contractions of the left ventricle.4 people found this useful.Don Dfoofnik.he bicuspid (or mitral) valves each have two large flaps, curved to close the rear entrance of a chamber, through which blood enter â¦ s. The tricuspid valve is located between the right atrium and the right ventricle. It normally has three flaps but may have two or even four flaps, and this can change with age.