In an experiment to demonstrate the mechanism of breathing by using a bell jar, two balloons in the bell jar and a rubber sheet are tied to the open end of bell jar:
(a)What does the space in the bell jar represents?
(b)What do the balloons in the bell jar represent?
(c)What does the rubber sheet tied over the open end of bell jar represents?
In an experiment to demonstrate the mechanism of breathing by using a bell jar, two balloons in the bell jar and a rubber sheet are tied to the open end of bell jar:
(a)What does the space in the bell jar represents?
(b)What do the balloons in the bell jar represent?
(c)What does the rubber sheet tied over the open end of bell jar represents?
Breathing:
The process, by which air is drawn in from the atmosphere into the lungs and forced out from the lungs back into the atmosphere is known as breathing.
(a) The space in the bell jar represents the thoracic cavity or chest cavity. The thoracic cavity is a large hollow space bounded by a rib cage on the sides and top, and the diaphragm on the bottom.
(b)The balloons in the jar represent the lungs. Lungs are a pair of spongy, elastic organs that lies in the thoracic cavity. It is a respiratory organ where the exchange of gases takes place.
(c) The rubber sheet tied over the open end of the bell jar represents the diaphragm. The diaphragm is a muscular sheet that separates the chest cavity from the abdominal cavity.
Breathing:
The process, by which air is drawn in from the atmosphere into the lungs and forced out from the lungs back into the atmosphere is known as breathing.
(a) The space in the bell jar represents the thoracic cavity or chest cavity. The thoracic cavity is a large hollow space bounded by a rib cage on the sides and top, and the diaphragm on the bottom.
(b)The balloons in the jar represent the lungs. Lungs are a pair of spongy, elastic organs that lies in the thoracic cavity. It is a respiratory organ where the exchange of gases takes place.
(c) The rubber sheet tied over the open end of the bell jar represents the diaphragm. The diaphragm is a muscular sheet that separates the chest cavity from the abdominal cavity.
