Which collects deoxygenated blood?

جو ڈی آکسیجن شدہ خون جمع کرتا ہے؟

Ventral aorta

Sinus venosus

Atrium

None of these

The sinus venosus collects deoxygenated blood from the body in fish and some amphibians.

It is a thin-walled chamber that directs blood to the atrium for further circulation.