| Name: | sinus venosus |
|---|---|
| Synonyms: | inflow tract |
| Definition: | Heart region collecting blood from the paired common cardinal veins and delivering to the atrium. One of four components of the heart. The sinus venosus also acts as a pacemaker and is the first to contract. |
| Ontology: | Anatomy Ontology [ZFA:0000154] |
| Name: | smooth muscle cell |
|---|---|
| Synonyms: | non-striated muscle cell |
| Definition: | A non-striated, elongated, spindle-shaped cell found lining the digestive tract, uterus, and blood vessels. They develop from specialized myoblasts (smooth muscle myoblast). |
| Ontology: | Anatomy Ontology [ZFA:0009118] |