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Nutrition in Humans

Special venou...

Question

Special venous connection between liver and intestine and between kidney and intestine is found in frogs, what are they called?

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Solution

Hepatic portal system:

The hepatic portal system has many veins that carry blood from the capillaries of the stomach, intestine, spleen, and pancreas to capillaries in the liver.

Renal portal system:

Renal portal system is a series of veins that carry blood from some of the posterior parts of the body to the kidneys.

Diagram:

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Q. Excess proteins are converted into urea in
(a) lungs
(b) liver
(c) kidneys
(d) intestine

Q. Look at this diagram of the human digestive system with four organs labelled as A, B, C and D.
Figure

The Organs A, B, C and D are:
(a) A-oesophagus; B-large intestine; C-liver; D-stomach
(b) A-oesophagus; B-stomach; C-liver; D-large intestine
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Q. Assertion :There is hepatic portal system in frogs. Reason: It is venous connection between liver and intestine in frog.

Q. How many of the given statements are correct with respect to a frog?
i. They have an open circulatory sytem
ii. There is a special venous connection between the liver and intestine as well as kidneys and the lower parts of the body.
iii. The blood supplies nutrients and

{CO}_{2}

to all parts of the body.

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Nutrition in Humans

Standard IX Biology

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