What is the sulcus terminalis?

The sulcus terminalis is an inconsistent depression of the myocardial surface of the right atrium of the heart. It extends a short distance inferiorly and to the right from the space intermediate to the superior vena cava and right auricle.

Sulcus terminalis. Terminal sulcus or Sulcus terminalis may refer to: Terminal sulcus (heart), a groove in the right atrium of the heart. Terminal sulcus (tongue), a groove that separates the tongue into a superior oral surface and a posterior pharyngeal surface.

what is sulcus terminalis in tongue? Medical Definition of sulcus terminalis 1 : a V-shaped groove separating the anterior two thirds of the tongue from the posterior third and containing the circumvallate papillae. 2 : a shallow groove on the outside of the right atrium of the heart.

Just so, what is the function of the Crista terminalis?

The crista terminalis represents the junction between the sinus venosus and the heart in the developing embryo.

Where is the sulcus terminalis?

The sulcus terminalis is an inconsistent depression of the myocardial surface of the right atrium of the heart. It extends a short distance inferiorly and to the right from the space intermediate to the superior vena cava and right auricle.

What is the function of right atrium?

Medical Definition of Right atrium Right atrium: The right upper chamber of the heart. The right atrium receives deoxygenated blood from the body through the vena cava and pumps it into the right ventricle which then sends it to the lungs to be oxygenated.

Where is the coronary sinus located?

The coronary sinus is a collection of smaller veins that merge together to form the sinus (or large vessel), which is located along the heart’s posterior (rear) surface between the left ventricle and left atrium.

What are Pectinate muscles?

The pectinate muscles (musculi pectinati) are parallel ridges in the walls of the atria of the heart. They are so-called because of their resemblance to the teeth of a comb as in pecten. Behind the crest (crista terminalis) of the right atrium the internal surface is smooth.

What does sinus venosus become?

The sinus venosus also forms the SA node and the coronary sinus; in (most) mammals only. The left portion shrinks in size and eventually forms the coronary sinus (right atrium) and oblique vein of the left atrium, whereas the right part becomes incorporated into the right atrium to form the sinus venarum.

Where is Musculi Pectinati found?

musculi pectinati (atria, anatomy) The musculi pectinati of the atria are internal muscular ridges generally on the anterolateral surface of the chambers. They are only present in the area derived from the embryological true atrium. In the right atrium, this is the area lateral to the crista terminalis.

What is Fossa Ovalis?

The fossa ovalis is a depression in the right atrium of the heart, at the level of the interatrial septum, the wall between right and left atrium. The fossa ovalis is the remnant of a thin fibrous sheet that covered the foramen ovale during fetal development.

What is the Thebesian valve?

The valve of the coronary sinus (Thebesian valve) is a semicircular fold of the lining membrane of the right atrium, at the orifice of the coronary sinus. It is situated at the base of the inferior vena cava. The valve may vary in size, or be completely absent.

What is the right auricle?

Last Updated: Jun 11, 2015. The right auricle of the heart – also called the right atrial appendage (RAA) – is attached to the heart’s right atrium. It’s a small, cone-shaped pouch which comes out from the upper and front part of the atrium and overlaps the root of the aorta.

What is tendon of Todaro?

tendon of Todaro. A fibrous structure formed by the junction of the eustachian valve and the thebesian valve (valves of the inferior caval vein and coronary sinus, respectively).

What is Chiari network?

The Chiari network is mobile, net-like structures occasionally seen in right atrium near the opening of inferior vena cava and coronary sinus. This is usually of no clinical significance and is often diagnosed incidentally.

Where is the AV node located?

The AV node lies at the lower back section of the interatrial septum near the opening of the coronary sinus, which conducts the normal electrical impulse from the atria to the ventricles.

What is the center of the heart called?

This wall is called the septum. Chambers of the heart. Your heart has four chambers. Two upper chambers, called the left and right atria, and two lower chambers, called the left and right ventricles, contract in a steady rhythm known as your heartbeat.

What is Atrium proper?

Atrium proper – located anterior to the crista terminalis, and includes the right auricle. It is derived from the primitive atrium, and has rough, muscular walls formed by pectinate muscles.

What is the function of fungiform papillae?

Fungiform. These mushroom-shaped papillae contain taste buds and sensory cells and are located primarily at the tip of the tongue.