Double Circulation
Double Circulation: Overview
This topic covers concepts such as Double Circulation, Systemic Circulation, Hepatic Portal System, etc.
Important Questions on Double Circulation
Which one of the following vertebrate organs receives the oxygenated blood only?
Which of the following does not contribute to increased stroke volume during exercise?
Study the following table:
| Part of heart | Location | Function | |
| A | Fossa ovalis | Interatrial septum | Directs blood from right atrium to left atrium |
| B | sinoatrial node | Wall of the right atrium | Initiation of systole |
| C | Atrio-ventricular node | Interventricular septum | Acts as pacemaker |
| D | Bicuspid valve | Left atrioventricular aperture | Directs blood to flow from left atrium to left ventricle |
Assertion (A): In human heart, deoxygenated blood always flows from right ventricle into pulmonary arch only
Reason (R): Mitral valve present at the base of pulmonary arch prevents the reverse flow of blood
The following characteristic features of circulatory system and heart types were found different animals, and
A) deoxygenated and oxygenated bloods are received by the heart separately but mixed blood will be pumped out from the heart
B) the oxygenated and deoxygenated bloods are received by the heart and the unmixed blood is pumped out separately
i) double circulation and -chambered heart
ii) incomplete double circulation and -chambered heart
iii) double circulation and -chambered heart
iv) incomplete double circulation and -chambered heart
Which of the following condition is correct?
The hepatic portal vein drains blood to the liver from;
Hepatic portal vein is found in
A portion of the cardiovascular system that transports oxygen-depleted blood from the heart to the lungs and brings oxygenated blood back to the heart is referred as
Observe the circulation image above and name the blood vessels A, B and C.
Choose the wrong statement regarding the circulatory system of frog.
The figure shows a schematic plan of blood circulation in humans with labels A to D. Identify the label and give its function/s.
Which of the following organs in vertebrates only receive oxygenated blood?
a. Heart
b. Lungs
c. Liver
d. Spleen
e. Gills
The blood vessel that carries absorbed nutrients such as glucose and amino acids from intestine to liver is
Which blood vessel ends in an organ other than the heart?
A unique vascular connection that exists between the digestive tract and liver is commonly known as
In humans, deoxygenated blood flows from:
The pulmonary artery carries
Which of the following option represents the correct blood flow pathway in pulmonary circulation?
In the given figure of the heart, which of the marked structures (1, 2, 3, 4, and 5) carry oxygenated blood?
