8.8.2a Respiratory Structures and Breathing Mechanisms in Humans and Animals (Objective Questions)

The diagram shows a model of the lungs.

What happen to R and T when the string is pushed upwards?

The diagram shows the respiratory system of an insect.
Which characteristic of adaptation is true about the structure R?
I.    Moist wall
II.  It has fluid at its end
III.    It is supported by rings of chitin
IV.    It is numerous in number

What process occurs at the gills of a fish during gaseous exchange?

The diagram shows a cross section through a part of lung.

What are the adaptations of alveolus which increases the rate of gaseous exchange?
I.          Thin epithelial walls
II.         A network of blood capillaries around it
III.       Small total surface area
IV.        The inner wall of the alveolus is folded

Which structure is involved in the breathing of a frog?