a. (i) Complete the table below with the respiratory surface of each of the listed organisms.
| organism | respiratory surface |
| Tadpole (2days old) | |
| Cockroach | |
| Domestic fowl | |
| Talinum | |
| Earth Worm | |
| Amoeba |
(ii) State five characteristic features of respiratory surfaces in organisms. [5 marks]
b. Make a drawing, 4 cm – 6 cm long of the respiratory organ in Tilapia and label fully. [9 marks]
Explanation
a. (i) Table
|
Organism |
Respiratory |
|
Tadpole (2 days old) |
Gill (External) |
|
Cockroach |
Trachea/tracheoles |
|
Domestic fowl |
Lung/lungs |
|
Talinum |
Stoma/stomata |
|
Earthworm |
(moist) Skin surface/body surface |
|
Amoeba |
Cell membrane/plasmalemma/body surface |
(ii) Characteristic Features of respiratory surfaces
- Large surface area;
- Thin-walled/thin body surface;
- Moist surface;
- Well-ventilated surface;
- Permeable surface;
- Highly vascularised/network of capillaries present.
b. Diagram of respiratory organ/gill of Tilapia
