Tag: body fluids and circulation

Questions Related to body fluids and circulation

Closed circulatory system is found in 

types of circulatory system circulatory pathways transportation in plants and circulation in animals body fluids and circulation biology

  1. Fishes

  2. Amphibians

  3. Birds

  4. All of the above

Show answer
Correct Option: D
Explanation:

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

types of circulatory system circulatory pathways transportation in plants and circulation in animals body fluids and circulation biology

  1. c only

  2. c and b

  3. a and b

  4. a only

Show answer
Correct Option: D
Explanation:

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.

So, the correct answer is option D.

In closed circulatory system, blood is enclosed by

types of circulatory system circulatory pathways transportation in plants and circulation in animals body fluids and circulation biology

  1. Tubes

  2. Ducts

  3. Valves

  4. Vessels

Show answer
Correct Option: D
Explanation:

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.

So, the correct answer is option D.

In circulatory system, valves occur in

types of circulatory system circulatory pathways transportation in plants and circulation in animals body fluids and circulation biology

  1. Heart and blood vessels of both vertebrates and invertebrates as well as vertebrate lymphatics

  2. Both vertebrate and invertebrate hearts

  3. Vertebrate heart only

  4. Both vertebrate and invertebrate hearts and their blood vessels.

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Correct Option: A

Circulation of blood was discovered by and father of blood circulation is

types of circulatory system circulatory pathways transportation in plants and circulation in animals body fluids and circulation biology

  1. William Harvey

  2. Karl Landsteiner

  3. Watson and Crick

  4. Bose

Show answer
Correct Option: A
Explanation:
William Harvey was an English physician and was the first known physician to describe completely, and in detail, the systemic circulation and properties of blood being pumped to the brain and body by the heart.

So, the correct answer is 'William Harvey'.

Which is incorrect?

types of circulatory system circulatory pathways transportation in plants and circulation in animals body fluids and circulation biology

  1. Veins are typically larger in diameter than arteries

  2. Because of their small size, blood flows more rapidly in capillaries than in other parts of circulatory system

  3. Walls of arteries are elastic enabling them to stretch and shrink during changes in blood pressure

  4. Veins contain more blood than any other part of circulatory system.

Show answer
Correct Option: B

Which ones have open circulatory system
1. Ascidia 2. Cockroach 3. Earthworm 4. Prawn 5. Silver Fish 6. Snail 7. Squid.

types of circulatory system circulatory pathways transportation in plants and circulation in animals body fluids and circulation biology

  1. 2, 4, 6

  2. 1, 2, 4, 6

  3. 3, 4, 5, 7

  4. 2, 4, 5, 6

  5. 1, 2, 4, 6, 7.

Show answer
Correct Option: D

which of the following vertebrate organ systems does not open directly to the external environment?

types of circulatory system circulatory pathways transportation in plants and circulation in animals body fluids and circulation biology

  1. Digestive system

  2. Circulatory system

  3. Excretory system

  4. Respiratory system

Show answer
Correct Option: B
Explanation:

The circulatory system is the only system which is not exposed to the external environment.

So, the correct option is 'Circulatory system'.

In which vertebrate oxygenated and deoxygenated blood gets mixed?

types of circulatory system circulatory pathways transportation in plants and circulation in animals body fluids and circulation biology

  1. Fish

  2. Amphibian

  3. Bird

  4. Mammal

Show answer
Correct Option: A
Explanation:

The amphibians have blood directed in two circuits with two atria and one ventricle where mixing of blood takes place.

So the correct answer is 'amphibian'.

In closed circulatory system 

types of circulatory system circulatory pathways transportation in plants and circulation in animals body fluids and circulation biology

  1. The cells and tissues are directly bathed in the blood pumped out by heart

  2. Arteries and veins are lacking

  3. The capillaries are largest blood vessels and closed at their ends

  4. Blood circulates through a series of vessels of varying diameters

Show answer
Correct Option: D
Explanation:

  • 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.

So, the correct option is 'Blood circulates through a series of vessels varying diameters'