Double Circulation and Regulation of Cardiac Activity

Which one of the following vertebrate organs receives the oxygenated blood only?

Hypophyseal portal system is found in

Which of the portal systems is/are not found in human beings?

Name the three portal systems found in animals.

Describe the role of Hepatic portal system in human body.

Explain coronary circulation of the human body.

Coronary veins open into coronary sinus.

Which of the following circulation regulates the blood supply to the heart in the body of a human?

Coronary arteries supply blood to the  _____ (liver/heart).

Pulmonary arteries supply blood to the heart.

Study the following table:

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, $\mathrm{A}$ and $\mathrm{B}$
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 $3$-chambered heart
ii) incomplete double circulation and $4$-chambered heart
iii) double circulation and $4$-chambered heart
iv) incomplete double circulation and $3$-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

Blood pressure in the pulmonary artery is
 

How do parasympathetic neural signals affect the working of the heart?
 

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

The bile secreted by the hepatic cells passes through the hepatic ducts and is stored and concentrated in a thin muscular sac called the _____.