Discover

'Sinus' may refer to:
In 'anatomy', where a sinus is a sac or cavity in any organ or tissue:

★ Paranasal sinus, an air cavity in the cranial bones, especially those near the nose

★ Sinus (anatomy), description of the general term

★ Anal sinuses, the furrows which separate the columns in the rectum

★ Dural venous sinuses, venous channels found between layers of dura mater in the brain
In the 'heart':

★ Sinus node, a structure in the superior part of the right atrium

★ Sinus rhythm, normal beating on an ECG

★ Coronary sinus, a vein collecting blood from the myocardium

★ Sinus venosus, a cavity in the heart of embryos

★ Sinus venarum, a part of the wall of the right atrium in adults, developed from the sinus venosus
'Other':

★ Sinus (botany), a space or indentation, usually on a leaf

Contents

See also

See also

★ Hemocoel, a space filled with hemolymph in organisms with open circulatory systems

★ Sine a trigonometric math function (Latin ''sinus'')

★ Sines, Portugal, a municipality in Alentejo (Latin ''Sinus'')