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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
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(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
(c) A-oesophagus; B-liver; C-stomach; 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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