Download App

Respiration and Circulation — BIOLOGY STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 ScienceBIOLOGYRespiration and Circulation3 Marks
Question
Give scientific Reson
Closed circulation is more efficient than open circulation.
✓

Answer

  1. Closed circulation considerably enhances the speed, precision and efficiency of circulation.
  2. The blood flows more rapidly, it takes less time to circulate through the closed system and return to the heart.
  3. This fastens the supply and removed of materials to and from the tissues by the blood as compared to open circulation.
  4. In open circulation, there are no blood vessels such as arteries or veins, to pump the blood.
  5. Therefore, the blood pressure is very low.
  6. Organisms with an open circulatory system typically have a relatively high volume of hemolymph and low blood pressure. Closed circulation is thus more efficient than open circulation.

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

Explore more

More "Answer the following questions in detail." from Respiration and Circulation→Respiration and Circulation — all question types→BIOLOGY STD 12 Science question papers→Maharashtra Board STD 12 Science question papers→Maharashtra Board question paper generator→

Similar questions

What are the different post-zygotic isolating mechanisms?
→
Distinguish between hyperthyroidism and hypothyroidism.
→
Blood plasma.
→
Describe mechanism of absorption of water.
→
Give reasons : Why are healthy root nodules pink in colour?
→
Why are angiosperm anthers called dithecous? Describe the structure of its microsporangium.
→
What is agamospermy? How is agamospermy different from parthenogenesis and parthenocarpy?
→
Draw a labelled diagram of a section through ovary.
→
Which process is involved in silk production from cocoon?
→
Column AColumn B
1Plasma Proteins.................... , ....................
2Nitrogenous waste.................... , ....................
3Inorganic Salts.................... , ....................
→