Biology

it passes twice through the heart in a complete circuit

it moves in both arteries and veins

it circulates in both the heart and other organs

the heart contain auricles and ventricles

3 → 2 → 1 → 4

2 → 3 → 1 → 4

2 → 1 → 3 → 4

1 → 2 → 3 → 4

auricles valve

tricupid valve

ventricles valve

bicuspid valve

it is made of breakable glass materials

it measures the rate of water intake

it measure the rate of water loss throuh the stern only

the movement of the air buble in the potometer cannot be timed accurately

intercostal muscles contract

diaphragm is raised

ribs are raised

Pressure of the thoracic cavity decreases