These have valves, which allow the flow of blood in one direction i.e. towards the heart and prevent the backward flow?
ان میں والوز ہیں ، جو خون کے بہاؤ کو ایک سمت میں یعنی دل کی طرف جانے اور پسماندہ بہاؤ کو روکنے کی اجازت دیتے ہیں؟
- Veins
- Arteries
- Capillaries
- None of these
Explanation
Veins carry blood toward the heart.
They have valves to prevent the backward flow of blood due to low pressure, especially in the limbs.
Arteries do not have valves (except at the heart).
Capillaries are too small and thin to have valves.
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