Question

Choose from the following the correct match of the two lists.

	List I (Example)		List II (Respiration)
A	Earthworm	1	Pulmonary
B	Human	2	Branchial
C	Prawn	3	Tracheal
D	Insects	4	Cutaneous

• A. A- 1, B- 2, C- 3, D- 4
• B. A- 4, B- 2, C- 1, D- 3
• C. A- 4, B- 1, C- 2, D- 3
• D. A- 3, B- 2, C- 4, D- 1

Answer 1

Answer: (C)

A- 4, B- 1, C- 2, D- 3

Earthworm - Earthworms have no special respiratory organs. Gases are exchanged through the moist skin and capillaries. Water, as well as salts, can also be moved through the skin by active transport. This type of respiration is termed as "cutaneous respiration".
Human - In humans respiration is through lungs and is termed as "pulmonary respiration". The mechanism of pulmonary respiration includes breathing movement, exchange of gases in lungs, transport of gases by blood and exchange of gases in tissues.
Prawn - In prawn gills are the chief respiratory organs, which are enclosed in a gill chamber on each side of the cephalothorax and are covered by a carapace. Fresh water enters the gill chamber in the form of a current. The highly vascularised gill-plates are covered with permeable membrane for the passage of gases. The respiration through gills is called as "branchial respiration".
Insects - The respiratory system of insects is a complex network of tubes called the "tracheal system", which delivers oxygen-containing air to every cell of the body. Air enters the insect's body through valve-like openings in the exoskeleton, called spiracles. After passing through a spiracle, air enters a longitudinal tracheal trunk, eventually diffusing throughout a complex, branching network of tracheal tubes, that subdivides into smaller and smaller diameters and reaches every part of the body. At the end of each tracheal branch, a special cell (the tracheole) provides a thin, moist interface for the exchange of gasses between atmospheric air and a living cell.