Sinus venosus

Definition

The sinus venosus is an embryonic heart chamber that plays a crucial role in the development of the mature heart, particularly in forming part of the right atrium and contributing to the sinoatrial node. It initially serves as the primary collecting chamber for oxygen-depleted blood returning to the heart from the body.

Related terms

Sinoatrial Node: The sinoatrial node acts as the heart's natural pacemaker, regulating heartbeat by initiating electrical impulses.

Right Atrium: The right atrium is one of four chambers in the heart that receives deoxygenated blood from systemic circulation and passes it to the right ventricle.

Embryonic Development: This refers to the process by which an embryo forms and develops, undergoing various stages of growth and differentiation into a complex organism