Dictionary > Sinus venosus

Sinus venosus

Definition
noun
In embryo, the cavity caudad of cardiac tube where the veins from the intra- and extraembryonic circulatory arcs meet, and receives blood from the vitelline vein, umbilical vein, and common cardinal vein
Supplement
In mammals, the sinus venosus is distinct in the heart of an embryo. As the embryo develops, the sinus venosus forms a part of the right atrium called sinus of the vena cava.
In other chordates such as fish, amphibians, and reptiles, the sinus venosus persists in adult. It is the chamber receiving blood from veins, and then passing blood into the atrium.
Synonym(s):

  • saccus reuniens


You will also like...

Human Nervous System
The Human Nervous System

The nervous system is essentially a biological information highway. This tutorial gives an overview of the nervous syste..

Freshwater Ecology
Freshwater Ecology

Freshwater ecology focuses on the relations of aquatic organisms to their freshwater habitats. There are two forms of co..

Endemic Flora of New Zealand
New Zealand’s Unique Flora

If New Zealand has lots of unique animals, it's also got a whole lot of unique plants. Find out more about some of them,..

Chromosome Mutations
Chromosome Mutations

Mutations can also influence the phenotype of an organism. This tutorial looks at the effects of chromosomal mutations, ..

bryophyte - sporophyte and gametophyte
Meiosis and Alternation of Generations

Plants are characterized by having alternation of generations in their life cycles. This tutorial is a review of plant m..

Ecological Research Measuring & Analysis
Ecological Research: Measuring & Analysis

This lesson is about the methods used for ecological research, such as quadrat and transect sampling, canopy fogging, an..

Related Articles...

No related articles found

See all Related Topics