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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:
संबंधित प्रश्न
Name the following:
The phase of the cardiac cycle in which the auricles contract.
Given below is a certain structure, write its chief functional activity.
Blood platelets - ______
Match the items given in Column A with the most appropriate ones in Column B and REWRITE the correct matching pairs :
Column A Column B
(i) Cranial nerves Testosterone
(ii) Leydig cells Natural reflex
(iii) Acetylcholine 12 pairs
(iv) Spinal nerves Prolactin
(v) Sneezing Neurotransmitter
- 18 pairs
- 31 pairs
- Conditioned reflex
Explain the structure and function of human blood.
Find the odd one out.
Name the main parts of the circulatory system
A female has haemophilic brother and parents having nonual blood clotting. She marries a male who has no history of haemophilia in his family. What is the possibility of her children having this disease?
The lymphatic system consists of which of the following?
Identify the function of the erythropoietin hormone produced by kidney cells.
Name the following :-
The cell organelle where photosynthesis occurs
