Question:
Identify the correct sequence of blood flow in a typical teleost :
Identify the correct sequence of blood flow in a typical teleost :
Show Hint
Remember the single circulation flow order: S-A-V-B (Sinus \(\rightarrow\) Atrium \(\rightarrow\) Ventricle \(\rightarrow\) Bulbus) for teleost fishes.
Updated On: Jul 21, 2026
- Conus arteriosus \(\rightarrow\) Atrium \(\rightarrow\) Ventricle \(\rightarrow\) Sinus venosus
- Sinus venosus \(\rightarrow\) Atrium \(\rightarrow\) Ventricle \(\rightarrow\) Bulbus arteriosus
- Conus arteriosus \(\rightarrow\) Ventricle \(\rightarrow\) Atrium \(\rightarrow\) Sinus venosus
- Sinus venosus \(\rightarrow\) Ventricle \(\rightarrow\) Atrium \(\rightarrow\) Bulbus arteriosus
Show Solution
Verified By Collegedunia
The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept:
Typical teleost (bony) fishes possess a single-circuit circulatory system where the heart receives only deoxygenated blood from the body tissues and pumps it directly to the gills for oxygenation.
The fish heart consists of four chambers arranged in series.
Step 2: Detailed Explanation:
Deoxygenated blood returning from the systemic circulation of the fish's body enters the heart chambers in a specific linear sequence:
1. Sinus venosus: A thin-walled sac that collects deoxygenated blood from the major veins (cardinal veins).
2. Atrium: A large, thin-walled muscular chamber that receives blood from the sinus venosus and pumps it into the ventricle.
3. Ventricle: A thick-walled, highly muscular chamber that generates the main pumping pressure to drive blood forward.
4. Bulbus arteriosus: A pear-shaped, elastic chamber (characteristic of teleosts) that buffers the pressure pulses generated by the ventricle, ensuring a continuous, non-pulsatile blood flow to the ventral aorta and gills.
In elasmobranchs (cartilaginous fishes), this fourth chamber is muscular and called the conus arteriosus, but in teleosts, it is highly elastic and called the bulbus arteriosus.
Therefore, the correct sequential pathway of blood flow is: Sinus venosus \(\rightarrow\) Atrium \(\rightarrow\) Ventricle \(\rightarrow\) Bulbus arteriosus.
Step 4: Final Answer:
The correct sequence is Sinus venosus \(\rightarrow\) Atrium \(\rightarrow\) Ventricle \(\rightarrow\) Bulbus arteriosus.
Typical teleost (bony) fishes possess a single-circuit circulatory system where the heart receives only deoxygenated blood from the body tissues and pumps it directly to the gills for oxygenation.
The fish heart consists of four chambers arranged in series.
Step 2: Detailed Explanation:
Deoxygenated blood returning from the systemic circulation of the fish's body enters the heart chambers in a specific linear sequence:
1. Sinus venosus: A thin-walled sac that collects deoxygenated blood from the major veins (cardinal veins).
2. Atrium: A large, thin-walled muscular chamber that receives blood from the sinus venosus and pumps it into the ventricle.
3. Ventricle: A thick-walled, highly muscular chamber that generates the main pumping pressure to drive blood forward.
4. Bulbus arteriosus: A pear-shaped, elastic chamber (characteristic of teleosts) that buffers the pressure pulses generated by the ventricle, ensuring a continuous, non-pulsatile blood flow to the ventral aorta and gills.
In elasmobranchs (cartilaginous fishes), this fourth chamber is muscular and called the conus arteriosus, but in teleosts, it is highly elastic and called the bulbus arteriosus.
Therefore, the correct sequential pathway of blood flow is: Sinus venosus \(\rightarrow\) Atrium \(\rightarrow\) Ventricle \(\rightarrow\) Bulbus arteriosus.
Step 4: Final Answer:
The correct sequence is Sinus venosus \(\rightarrow\) Atrium \(\rightarrow\) Ventricle \(\rightarrow\) Bulbus arteriosus.
Was this answer helpful?
0
0
Top ICAR AIEEA Fisheries Science Questions
- How does climate variability influence biological productivity and fisheries sustainability?
- The density of seawater at $4^{\circ}\text{C}$ is}
- How does phytoplankton biomass impact fisheries productivity?
- What role do bio-indicators play in assessing aquatic pollution levels?
- How does water pH influence fish physiology and ecology?
View More Questions
Top ICAR AIEEA Fish Taxonomy Questions
- Nauxim bay is famous for the fishery of
- Type of caudal fin present in classes Dipnoi and Holocephali is
- Given below are two statements:
Statement (I): Rhodeus deposits eggs on the mantle cavity of freshwater mussel
Statement (II): Careproctus deposits eggs beneath the carapace of crabs
In light of the above statements, choose the most appropriate answer from the options given below. - Given below are two statements:
Statement (I): In fish, prolactin increases glomerular filtration rate in the kidney
Statement (II): In fish, prolactin functions predominately in freshwater osmoregulation
In light of the above statements, choose the most appropriate answer from the options given below. - Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).
Assertion (A): Freshwater fishes produce a large amount of diluted urine
Reason (R): Skin has low permeability to the water and salt ions
In light of the above statements, choose the correct answer from the options given below.
View More Questions
Top ICAR AIEEA Questions
- Which of the following statements is false?
- Which of the following is an example of an inventory?
- According to Adam Smith, productivity gains could be brought about through .
- The supply curve for an artificially scarce good is .
- Which of the following would not be considered an opportunity cost of paid employment?
View More Questions