The projecting part of the ear lying outside the head
It collects deoxygenated blood from the bloodstream and moves it into the heart's right ventricle. 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. The RAA is very muscular, and is lined with small muscles on its surface.  auricle (o´ô) , rikəl n. 1 the oval flap of the external part of the. ear n. 2, atrium the chamber of the heart that receives the: blood on the, right from the general, circulation and on the, left from the pulmonary. circulation auricle. 1. the projecting part of the ear lying outside the head; called also pinna. Auricle. 2. the ear-shaped appendage of either atrium of the heart; formerly used to designate the entire atrium. (aw'ri-kl), [TA] Avoid the outmoded use of this word in the sense of atrium. In the Heart. When referencing the heart, the auricle typically describes part of either the left of the right atrium. The human heart is made up of four main chambers, two ventricles and two atria, one each on the left and right sides. Atria typically sit just above the ventricles and help process blood as it pumps. In the context of human anatomy, the auricle can refer to either one of two distinct body parts: the outer ear or an internal “pouch” or protective layer in the heart. Left Auricle. The left auricle, also known as the left atrial appendage (LAA), is a flap of heart wall on the anterior surface of the left atrium of the heart.  Auricle. The auricle is also known as the pinna, and it is most commonly referred to as the ear. It is the most obviously visible part of the auditory system. An auricle consists of skin over contoured cartilage, and it is held in place by muscles and ligaments. Shape may differ by body type and person. Auricles are located on both sides of the head, near the temple and where the jaw meets the skull. The ear is the first part of the body to come in contact with auditory stimuli. Sound waves must pass over the auricle before entering the ear canal. Then, the waves pass through the tympanic membrane (eardrum) and into the middle ear. There, the sound waves vibrate a series of bones known as the ossicles. 2. (Anatomy) Also called: pinna anatomy the external part of the ear. 3. (Biology) Also called: auricula biology an ear-shaped part or appendage, such as that occurring at the join of the leaf blade and the leaf sheath in some grasses. [C17: from Latin auricula the external ear, from auris ear]. (ˈɔr ɪ kəl).  In regards the heart, the auricle is a part of the atrium, specifically the small, cone-shaped muscular pouch that projects from it. In the heart, the auricle is a small, cone-shaped pouch that projects from the atrium, one of the upper chambers. The visible part of a person's ear is called the auricle, also known as the pinna. In the context of human anatomy, the auricle can refer to either one of two distinct body parts: the outer ear or an internal “pouch” or protective layer in the heart. The auricle or auricula is the visible part of the ear that resides outside of the head. It is also called the pinna (Latin for wing / fin, plural pinnae), a term that is used more in zootomy. 
http://www.innerbody.com/anatomy/cardiovascular/right-auricle http://medical-dictionary.thefreedictionary.com/Auricle http://www.wisegeek.org/in-anatomy-what-is-the-auricle.htm http://www.innerbody.com/anatomy/cardiovascular/left-auricle http://www.healthline.com/human-body-maps/auricle http://www.thefreedictionary.com/auricle http://www.wisegeek.org/in-anatomy-what-is-the-auricle.htm https://en.wikipedia.org/wiki/Pinna_(anatomy)
what is auricle