Respiration in Organisms

Fill in the blanks with suitable words.
(a) The roots of a plant take up oxygen from the ______
trapped between the ________ particles.
(b) Diaphragm forms the ___________ of the chest cavity.
(c) Exchange of gases in the leaves take place with the help
of __________.
(d) Cockroaches breathe with the help of air tubes called
___________.