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Open Circulatory System – Blood flows freely through open spaces or sinuses, rather than being confined to vessels. Example: Arthropods (insects) and mollusks.
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Closed Circulatory System – Blood remains within a network of vessels (arteries, veins, and capillaries) throughout the body. Example: Vertebrates (humans, fish, amphibians) and annelids (earthworms).
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प्रश्न
Name these:
Two kinds of circulatory systems in different animals.
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उत्तर
The two kinds of circulatory systems in different animals are:
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संबंधित प्रश्न
Explain ABO blood group system in human being with a suitable chart.
The diagram given below represents a section of the human heart. Answer the questions that follow:

- Which parts of heart are in the diastolic phase? Give a reason to support your answer.
- Label the parts numbered 1 and 2 in the diagram. What type of blood flows through them?
- What causes the heart sounds ‘LUBB’ and ‘DUP’?
- Name the blood vessels that supply oxygenated blood to the heart muscles.
- Draw neat labelled diagrams of a cross section of an artery and a vein.
State the exact location of the Chordae tendinae
Differentiate between LUBB and DUP (names of the valves whose closure produce the sound)
Give appropriate biological or technical terms for the following
The relaxation phase of the heart.
What are the average values of blood pressure in a normal adult human?
Name the following:
The artery which carries deoxygenated blood.
How do you account for the following difference?
The walls of the right ventricle are thicker than those of the right auricle.
Given below is a highly schematic diagram of the human blood circulatory system.
Which numbers represent the following respectively?
Aorta
Hepatic portal vein
Pulmonary artery
Superior vena cava
Renal vein
Stomach

Name these:
Three circulating fluids in human body.
