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A vein possesses a large lumen because;

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Important Questions on Body Fluids and Circulation

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Biology>Human Physiology>Body Fluids and Circulation>Human Circulatory System
Correct course of blood circulation in human heart.
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Biology>Human Physiology>Body Fluids and Circulation>Human Circulatory System
Match the items given in Column I with those in Column II and select the correct option given below:
 
  Column – I   Column – II
a. Tricuspid valve i. Between left atrium and left ventricle.
b. Bicuspid valve ii. Between the right ventricle and pulmonary artery.
c. Semilunar valve iii. Between the right atrium and right ventricle.
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Biology>Human Physiology>Body Fluids and Circulation>Human Circulatory System
The hepatic portal vein drains blood to the liver from
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Biology>Human Physiology>Body Fluids and Circulation>Human Circulatory System
Erythropoiesis starts in:
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Biology>Human Physiology>Body Fluids and Circulation>Human Circulatory System

Which one of the following graphs best describes the Blood Pressure (BP) change when blood moves from aorta to capillaries?

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Biology>Human Physiology>Body Fluids and Circulation>Human Circulatory System
Doctors use a stethoscope to hear the sounds produced during each cardiac cycle. The second sound is heard when:
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Biology>Human Physiology>Body Fluids and Circulation>Human Circulatory System
Which one of the following animals has two separate circulatory pathways?
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Biology>Human Physiology>Body Fluids and Circulation>Human Circulatory System
Match the different types of heart given in column A with organisms given in column B. Choose the correct combination.
 
Column A Column B
P. Neurogenic heart. i. Human
Q. Bronchial heart. ii. King crab
R. Pulmonary heart. iii. Shark
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Biology>Human Physiology>Body Fluids and Circulation>Human Circulatory System

Given below are sets of five terms each. Rewrite the terms in correct order in a logical sequence beginning with the first word that is underlined:

Artery, Capillaries, Venule, Vein, Arteriole.

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Statement (S): The sinoatrial node is called 'Pace-maker'.

Reason (R): The sinoatrial node contains specialised cardiomyocytes and generates action potentials without any external stimuli.

The correct answer is

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Biology>Human Physiology>Body Fluids and Circulation>Human Circulatory System
The pulmonary artery carries
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Biology>Human Physiology>Body Fluids and Circulation>Human Circulatory System
Blood pressure in the pulmonary artery is:
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Biology>Human Physiology>Body Fluids and Circulation>Human Circulatory System
Assertion (A): Pulmonary aorta in human embryo communicates with systemic aorta by a thin vessel called ductus arteriosus.
Reason (R): In the heart of the human embryo, oxygenated and deoxygenated blood is completely separated.
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Biology>Human Physiology>Body Fluids and Circulation>Human Circulatory System
Purkinje fibres are located in the following structure/s
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Biology>Human Physiology>Body Fluids and Circulation>Human Circulatory System
Blood pressure in the mammalian aorta is maximum during
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Biology>Human Physiology>Body Fluids and Circulation>Human Circulatory System
In mammals, which blood vessel would normally carry the largest amount of urea?
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Biology>Human Physiology>Body Fluids and Circulation>Human Circulatory System
Arteries are best defined as the vessels which
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Biology>Human Physiology>Body Fluids and Circulation>Human Circulatory System
Which of the following vertebrate organs receives both oxygenated and deoxygenated blood?
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Biology>Human Physiology>Body Fluids and Circulation>Human Circulatory System
Which of the following sequences is truly a systemic circulation pathway?
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What is the nature of blood passing through the blood vessels A, B, C and D respectively?
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