Valves are absent in ________.

Thoracic duct

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Lymph capillaries

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Subclavian vein

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Brachial vein

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Solution

The correct option is B
Lymph capillaries

Valves are absent in lymphatic capillaries. Lymph flows in lymph vessels due to contraction of the surrounding muscles. Valves are present in arteries and veins carrying blood. It regulates the flow of blood into a single direction.

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Similar questions

Complete the following statements by filling in the blanks from the choices given in the bracket.
(a) The blood vessel that begins and ends in capillaries is the ... (hepatic artery. Hepatic portal vein, hepatic vein)
(b) A blood vessel which has a small lumen and thick walls is (capillary, lymphatic duct, artery, venule)
(c) the valve which prevents backflow of blood in the veins and lymph vessels... (mitral valve, tricuspid valve, semilunar valve).

Q. Name the structures that are present in veins and lymph ducts but absent in arteries.

Why are valves absent in arteries and present in veins?

Q. Very short answer type.
Normally a vein opens into a larger vein or into the heart but does not end in capillaries. Which vein/ veins in humans is/are exception to this rule?

Q. Which vessels of the cardiovascular system (arteries, veins, or capillaries) produce lymph?

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Standard X Biology

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Valves are absent in ________.

The correct option is B Lymph capillaries Valves are absent in lymphatic capillaries. Lymph flows in lymph vessels due to contraction of the surrounding muscles. Valves are present in arteries and veins carrying blood. It regulates the flow of blood into a single direction.

The correct option is B
Lymph capillaries

Valves are absent in lymphatic capillaries. Lymph flows in lymph vessels due to contraction of the surrounding muscles. Valves are present in arteries and veins carrying blood. It regulates the flow of blood into a single direction.