Question
Describe the circulatory system in a fish.

Answer

The fish has a two chambered heart. Oxygenation of the blood takes place in the gills. The oxygenated blood from the gills is supplied to the body parts of the fish where oxygen is utilized and carbon-dioxide enters into it making it deoxygenated. The deoxygenated blood returns to the heart to be pumped into gills again.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

What is meant by homologous series of carbon compounds? Classify the following carbon compounds into two homologous series and name them.
$C_3 H_4, C_3 H_6, C_4 H_6, C_4 H_8, C_5 H_8, C_5 H_{10}$
A solution of $CuSO_4$ was kept in an iron pot. After few days, the iron pot was found to have a number of holes in it. Explain the reason in terms of reactivity. Write the equation of the reaction involved.
A domestic lighting circuit has a fuse of 5A. If the mains supply is at 230V, calculate the maximum number of 36W tube-lights that can be safely used in this circuit.
When and where do we see a rainbow? How is a rainbow formed? Draw a labelled diagram to illustrate the formation of a rainbow.
What is baking soda? Write the chemical name of baking soda. Give the important uses of baking soda. How does baking soda differ chemically from washing soda?
The power of a combination of two lenses X and Y is 5D. If the focal length of lens X be 15cm:
  1. Calculate the focal length of lens Y.
  2. State the nature of lens Y.
A bright object 50mm high stands on the axis of a concave mirror of focal length 100mm and at a distance of 300mm from the concave mirror. How big will the image be?
How does the resistance of a wire change when:
  1. Its length is tripled?
  2. Its diameter is tripled?
  3. Its material is changed to one whose resistivity is three times?
State Dobereiner's law of triads.
An object 2cm tall stands on the principal axis of a converging lens of focal length 8cm. Find the position, nature and size of the image formed if the object is:
  1. 12cm from the lens.
  2. 6 cm from the lens.