Worksheet Chapter 8: Respiratory Systems in Humans and Animals

1. Fill in the blank: The specialized mechanism in fish gills where blood flows in the opposite direction to water flow across lamellae is called ________ flow.

2. Compare the respiratory structures and gas transport mechanisms of an Insect and a Fish.

3. True or False: During human inhalation, the diaphragm contracts and curves upwards into a dome shape.

4. Explain how emphysema affects the respiratory system and impairs gas exchange in cigarette smokers.

5. In which form is approximately 70% of carbon dioxide transported in human blood?

6. Define the term 'cutaneous respiration' and name one animal that utilizes it.

7. Explain the chemical process by which carbon dioxide is converted into bicarbonate ions inside red blood cells.

8. True or False: Insects rely on hemoglobin in their blood to transport oxygen from spiracles to muscle tissue.

9. Describe the events that occur in the human thorax during EXHALATION.

10. State two structural adaptations of human alveoli that facilitate efficient gas exchange.