Venous valves are responsible for ___________________.

Preventing anterograde flow

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Channeling blood away from the heart

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Channeling blood towards the heart

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Preventing blood from re-entering a ventricle

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A Preventing anterograde flow
Venous values are responsible for preventing anterograde flow that is the flow which is in the forward direction.
Venous values are bicuspid (two) flap like structures made of elastic tissue. The values function to keep moving (blood) in one direction the venous values open to allow one-way flow in the direction of the Heart. When the muscles relax, the value close to stop any back-flow.

Suggest Corrections

Similar questions

Q. Complete the following passage:

Valves function to prevent backflow of blood and maintain a unidirectional circulation of blood within the body. The (i)__________ valve separates the right atrium from the right ventricle whereas the (ii)_____________ valve separates the left atrium and left ventricle. The (iii)___________ valve prevents the backflow of deoxygenated blood from the pulmonary artery into the right ventricle while the (iv)__________ valve prevents the backflow from aorta into the left ventricle.

Q. Match the chambers of the human heart in Column A to its function in Column B.

\begin{matrix} C o l u m n A & C o l u m n B (i) R i g h t a t r i u m & (a) P u m p s d e o x y g e n a t e d b l o o d t o l u n g s (i i) L e f t a t r i u m & (b) R e c e i v e s o x y g e n a t e d b l o o d f r o m l u n g s (i i i) R i g h t v e n t r i c l e & (c) P u m p s o x y g e n a t e d b l o o d t o t h e b o d y (i v) L e f t v e n t r i c l e & (d) R e c e i v e s d e o x y g e n a t e d b l o o d f r o m t h e b o d y \end{matrix}

Q. A person with blood group A can (a) donate blood to, and (b) receive blood from,

Q. A man with blood group A can receive blood from persons having blood groups

Give a reason for the following:
(a) The walls of the left ventricle are thicker than the walls of all other chambers.
(b) Blood flows away from the stomach and intestines is put into circulation via the liver and not directly.
(c) The blood groups of both the donor and recipient must be known before transfusing blood.
(d) Only the veins and not the arteries are provided with a valve.
(e) Atrial wall is less muscular than the ventricular wall.
(f) The arteries are deep-seated in the body.

Join BYJU'S Learning Program