Tag: transportation in plants and circulation in animals
Questions Related to transportation in plants and circulation in animals
Closed circulatory system is found in
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Fishes
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Amphibians
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Birds
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All of the above
Vertebrates, and a few invertebrates, have a closed circulatory system. Closed circulatory systems have the blood closed at all times within vessels of different size and wall thickness. In this type of system, blood is pumped by a heart through vessels, and does not normally fill body cavities. In fish, blood flows from the heart to the gills for gas exchange, then to the rest of the body, and finally back to the heart. This is called a single circulation since the blood flows through the heart only once during each complete trip around the body. Amphibians evolved a double circulation; blood flows from the heart to the gills or lungs for gas exchange, then back to the heart to be repressurized before flowing to the rest of the body. The vessels that serve the respiratory organs are called the branchial circuit (for gills) or pulmonary circuit (for lungs). Vessels that serve the rest of the body are called the systemic circuit. The amphibian heart and most reptilian hearts have only three chambers, two atria and one ventricle and there is some mixing of oxygen-rich and oxygen-poor blood in the single ventricle. Endothermic vertebrates, the birds and mammals, have higher metabolic rates and require stricter separation of the pulmonary and systemic blood. Thus, they have four-chambered hearts. Oxygen-rich blood flows through the other ventricle to the systemic circuit.
The open circulatory system is present in-
(a) Arthropoda, (b) Annelida, (c) Chordates, (d) Mollusca
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c only
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c and b
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a and b
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a only
An open circulatory system is present in arthropods in which blood is pumped by the heart passes through large vessels into open spaces or body cavities called sinuses. Annelids and chordates have a closed circulatory system in which the blood pumped by the heart is always circulated through a closed network of blood vessels.
In closed circulatory system, blood is enclosed by
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Tubes
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Ducts
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Valves
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Vessels
In closed circulatory system, blood flows through closed chambers called as vessels. In open circulatory system, the blood flows in the closed vessel which further opens into a body cavity called haemocoel.
In circulatory system, valves occur in
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Heart and blood vessels of both vertebrates and invertebrates as well as vertebrate lymphatics
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Both vertebrate and invertebrate hearts
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Vertebrate heart only
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Both vertebrate and invertebrate hearts and their blood vessels.
Circulation of blood was discovered by and father of blood circulation is
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William Harvey
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Karl Landsteiner
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Watson and Crick
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Bose
Which is incorrect?
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Veins are typically larger in diameter than arteries
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Because of their small size, blood flows more rapidly in capillaries than in other parts of circulatory system
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Walls of arteries are elastic enabling them to stretch and shrink during changes in blood pressure
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Veins contain more blood than any other part of circulatory system.
Which ones have open circulatory system
1. Ascidia 2. Cockroach 3. Earthworm 4. Prawn 5. Silver Fish 6. Snail 7. Squid.
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2, 4, 6
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1, 2, 4, 6
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3, 4, 5, 7
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2, 4, 5, 6
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1, 2, 4, 6, 7.
which of the following vertebrate organ systems does not open directly to the external environment?
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Digestive system
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Circulatory system
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Excretory system
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Respiratory system
The circulatory system is the only system which is not exposed to the external environment.
In which vertebrate oxygenated and deoxygenated blood gets mixed?
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Fish
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Amphibian
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Bird
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Mammal
The amphibians have blood directed in two circuits with two atria and one ventricle where mixing of blood takes place.
In closed circulatory system
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The cells and tissues are directly bathed in the blood pumped out by heart
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Arteries and veins are lacking
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The capillaries are largest blood vessels and closed at their ends
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Blood circulates through a series of vessels of varying diameters
- Closed circulatory system has blood enclosed all the time within the vessels. In this system, blood is pumped by the heart through vessels.
- It is more structured and controlled.