41 terms

KAAP310 Lab Practical #1 (The Heart)


Terms in this set (...)

Base of the heart
The part of the heart that lies opposite the apex, formed mainly by the left atrium but to a small extent by the posterior part of the right atrium
Apex of the heart
The tip of the heart; is formed by the left ventricle, so it is essentially the most inferior portion of the heart.
Thin, smooth innermost layer of the heart that lines the chambers of the heart.
Muscular tissue of the heart
Serous membrane forming outer surface of heart and inner surface of pericardium
Right & Left Atria
Blood collection chambers before the ventricles
Interatrial septum
Wall of tissue that separates the right and left atrium of the heart
Coronary sulcus (atrioventricular groove)
A groove on the outer surface of the heart that divides the atria from the ventricles.
Thin flap of heart wall that plays important role in the pumping of blood within the heart.
Right & Left Ventricle
Receive blood from atrium and expel it to the rest of the body.
Interventricular Septum
Separates the left ventricle from the right
Anterior and posterior interventricular sulci
Groove that separates the ventricles of the heart
Superior & Inferior Vena Cava
Large veins that return deoxygenated blood to the heart
Pulmonary trunk
A vessel that arises from the right ventricle of the heart, extends upward, and divides into the right and left pulmonary arteries that convey deoxygenated blood to the lungs.
Right & Left Pulmonary Arteries
The pulmonary artery carries deoxygenated blood from the right ventricle to the lungs. The blood here passes through capillaries adjacent to alveoli and becomes oxygenated as part of the process of respiration.
Right & Left Pulmonary Veins
Pulmonary veins are responsible for carrying oxygenated blood from the lungs back to the left atrium of the heart.

-This differentiates the pulmonary veins from other veins in the body, which are used to carry deoxygenated blood from the rest of the body back to the heart.
The main artery of the body, supplying oxygenated blood to the circulatory system.
Ascending aorta
Is a portion of the aorta commencing at the upper part of the base of the left ventricle; passes obliquely upward, forward, and to the right, in the direction of the heart's axis.
Aortic Arch
The aortic arch is the portion of the main artery that bends between the ascending and descending aorta.
Descending Aorta
The descending aorta is the part of the aorta beginning at the aortic arch that runs down through the chest and abdomen.
Brachiocephalic trunk
Is an artery of the mediastinum that supplies blood to the right arm and the head and neck. It is the first branch of the aortic arch, and soon after it emerges, the brachiocephalic artery divides into the right common carotid artery and the right subclavian artery.
Left common carotid artery
Are arteries that supply the head and neck with oxygenated blood; they divide in the neck to form the external and internal carotid arteries.
Left subclavian artery
First part of the ___________ rises from the arch of the aorta, behind the left common carotid, and at the level of the fourth thoracic vertebra;
Right coronary artery
Is an artery originating above the right cusp of the aortic valve. It travels down the right atrioventricular groove, towards the crux of the heart.
Right marginal artery
A large marginal branch which follows the acute margin of the heart and supplies branches to both surfaces of the right ventricle.
Left coronary artery
Is an artery that arises from the aorta above the left cusp of the aortic valve and feeds blood to the left side of the heart.
Circumflex artery
Is an artery that branches off from the left coronary artery to supply portions of the heart with oxygenated blood
Anterior interventricular (left anterior descending) artery
Is a branch of the left coronary artery that supplies the anterolateral myocardium, apex, and interventricular septum.
Coronary sinus
a wide venous channel that receives blood from the coronary veins and empties into the right atrium of the heart.
Anterior cardiac vein
Comprises of three or four small vessels which collect blood from the front of the right ventricle and open into the right atrium.
Small cardiac vein
Runs in the coronary sulcus between the right atrium and ventricle and opens into the right extremity of the coronary sinus. It receives blood from the posterior portion of the right atrium and ventricle. It may drain to the coronary sinus, right atrium, middle cardiac vein, or be absent.
Great cardiac vein
This cardiac vein returns deoxygenated blood (metabolic waste products) from the anterior surfaces of the left ventricle.
Pectinate muscles
Parallel ridges in the walls of the atria of the heart.
Papillary muscles
Muscles located in the ventricles of the heart. They attach to the cusps of the atrioventricular valves (also known as the mitral and tricuspid valves) via the chordae tendineae and contract to prevent inversion or prolapse of these valves on systole (or ventricular contraction).
Chordae tendineae
The chordae tendinae (tendinous chords), colloquially known as the heart strings, are cord-like tendons that connect the papillary muscles to the tricuspid valve and the mitral valve in the heart and prevent inversion or prolapse of these valves.
Atrioventricular valves
A valve between an atrium and ventricle of the heart
Tricuspid valve
Is on the right dorsal side of the mammalian heart, between the right atrium and the right ventricle. The function of the valve is to prevent back flow of blood into the right atrium. Also known as the right atrioventricular valve.
Mitral (bicuspid) valve
The valve between the left atrium and the left ventricle of the heart, consisting of two tapered cusps.
Semilunar valves
Each of a pair of valves in the heart, at the bases of the aorta and the pulmonary artery, consisting of three cusps or flaps that prevent the flow of blood back into the heart.
Aortic valve
A valve in the human heart between the left ventricle and the aorta.
Pulmonary valve
Is the semilunar valve of the heart that lies between the right ventricle and the pulmonary artery and has three cusps.