[DOC] [TLE] Anatomy 101: The Heart | Parts of the Heart | Idiot's Guides [PAR] Get information on the anatomy and different parts of the heart. ... From the base, 
the heart narrows to a blunt, rounded point called the apex, ... These grooves are 
on top of the muscle wall (the interventricular septum) that ... Small cardiac vein. 
... two upper chambers called atria (a right one and a left one) and two lower... [DOC] [TLE] Anatomy of Heart - Human Anatomy [PAR] They are separated from each other by the vertical atrioventricular groove. ... The 
base of the heart (posterior surface): It is formed mainly by the left atrium, ... The 
lower border is formed by right ventricle, however, some part of it is also ... It 
consists of two regions: the main concavity and a small outpouching called 
auricle. [DOC] [TLE] Heart Structure - Anatomy & Physiology - WikiVet English [PAR] May 17, 2016 ... The paraconal groove runs over the left surface of the heart from the coronary ... 
The cavity between the two layers contains a small volume of fluid ... The 
myocardium, comprised of cardiac muscle tissue, makes up the ... The two upper 
chambers are the atria and the two lower chambers are the ventricles. [DOC] [TLE] V. Angiology. 4b. The Heart. Gray, Henry. 1918. Anatomy of the ... [PAR] The heart therefore consists of four chambers, viz., right and left atria, and ... 
these grooves extend from the base of the ventricular portion to a notch, the ... Its 
upper part is separated from the lower by the coronary sulcus, and is ... The 
auricula is a small conical muscular pouch, the margins of which present a 
dentated edge. [DOC] [TLE] Chambers of the Heart - Boundless [PAR] The right atrium receives deoxygenated blood from systemic circulation and the 
left ... systemic circulation while the right side of the heart deals with pulmonary 
circulation. ... blood pressure to build up over a long period of time to enter the 
atria. ... ventricle pumps only to the lungs, which is a much smaller volume of 
blood. [DOC] [TLE] Structures of the Heart - Boundless [PAR] The heart is divided into four chambers consisting of two atria and two ... large 
vein that carries deoxygenated blood from the lower half of the body to the right ... 
Since the right side of the heart sends blood to the pulmonary circuit, it is smaller 
than ... The myocardium consists of the heart muscle cells that make up the 
middle... [DOC] [TLE] Chapter 23: The pericardium and heart [PAR] The surface area of the heart, as determined from PA chest x-rays, is used as an 
index of size. ... The sinu-atrial node is embedded within the upper part of the 
crista ... This grove is the location of the coronary sinus and the proximal portions 
of ... chambers show a number of small foramina for the intrinsic veins of the heart
... [DOC] [TLE] Words to Know (Heart Glossary) - KidsHealth [PAR] The atria are the chambers that fill with the blood returning to the heart from the ... 
The heart and circulatory system (also called the cardiovascular system) make up 
the ... decreases the blood flow from the heart out to the lower portion of the body. 
... These waves are bounced off the parts of the heart, creating a picture of the... [DOC] [TLE] Heart - Wikipedia [PAR] The heart is a muscular organ in humans and other animals, which pumps blood 
through the ... These generate a current that causes contraction of the heart, 
traveling ... The upper part of the heart is the attachment point for several large 
blood .... The muscle cells make up the bulk (99%) of cells in the atria and 
ventricles. [DOC] [TLE] Heart Anatomy: chambers, valves and vessels : Anatomy & Physiology [PAR] Sep 1, 2013 ... Heart anatomy and physiology: heart chambers and valves, heart vessels. Where 
they're ... right atrium has two basic parts: a smooth posterior and an anterior 
portion in which bundles of muscle tissue form ridges in the walls. The muscle ...

Question: The atria make up the upper, smaller part of the heart & these chambers form the lower portion
Answer: Ventricles