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 tricuspid valve is between the right atrium and ventricle. The pulmonary semilunar valve is where the blood flows out of the right ventricle, into the pulmonary circuit.The tricuspid has 3 flaps on it and also has chordae tendineae which attach to papillary muscles.These chords help prevent hold the valve in place.he tricuspid valve is a valve so the flow of blood does not go backwards through the heart. It is located between the right atrium and the right ventricle in the heart. You c â¦ an pull up a picture in google of the lableing of the heart and can see the tricuspid valve in the heart. 2 people found this useful.