The sequence of the one-way gaseous exchange mechanism in a fish is?
Question
The sequence of the one-way gaseous exchange mechanism in a fish is?
Options
A)
mouth --> operculum -> gills
B)
mouth -> gills > operculum
C)
operculum > gills -> mouth
D)
gills -> operculum --> mouth
The correct answer is B.
Explanation:
Fish exchange gases by pulling oxygen-rich water through their mouths and pumping it over their gills. In some fish, capillary blood flows in the opposite direction to the water, causing counter-current exchange. The gills push the oxygen-poor water out through openings in the sides(opercula) of the pharynx.
More Past Questions:
Discussion
Other Subjects
- English Language
- Mathematics
- Government
- Physics
- Economics
- Chemistry
- Christian Religious Knowledge
- Commerce
- Geography
- Literature In English
- Accounts
- Agricultural Science
- General Paper
- Islamic Religious Knowledge
- History
- Further Mathematics
- Current Affairs
- Civic Education
- Math
- Reading
- Writing and Language
- Computer Studies
- French
- Home Economics
- Hausa
- Yoruba
- Igbo
- Fine Arts