UR-AK49: Difference between revisions

Latest revision as of 03:28, 13 February 2025

Anatomy of the Human Heart[edit]

The human heart is a muscular organ responsible for pumping blood through the circulatory system. It is located in the thoracic cavity, between the lungs, and is roughly the size of a fist. The heart is composed of four chambers: two upper chambers called the atria and two lower chambers called the ventricles.

Structure[edit]

The heart is enclosed in a double-walled sac called the pericardium, which provides protection and lubrication. The heart wall itself is composed of three layers: the outer epicardium, the middle myocardium, and the inner endocardium.

Chambers[edit]

The heart's four chambers are:

Right Atrium: Receives deoxygenated blood from the body through the superior vena cava and inferior vena cava.
Right Ventricle: Pumps deoxygenated blood to the lungs via the pulmonary artery.
Left Atrium: Receives oxygenated blood from the lungs through the pulmonary veins.
Left Ventricle: Pumps oxygenated blood to the body through the aorta.

Valves[edit]

The heart contains four main valves that ensure unidirectional blood flow:

Tricuspid Valve: Located between the right atrium and right ventricle.
Pulmonary Valve: Located between the right ventricle and pulmonary artery.
Mitral Valve: Located between the left atrium and left ventricle.
Aortic Valve: Located between the left ventricle and aorta.

Function[edit]

The primary function of the heart is to maintain a continuous flow of blood throughout the body, delivering oxygen and nutrients to tissues and removing carbon dioxide and other wastes. This is achieved through the cardiac cycle, which consists of two main phases: systole and diastole.

Cardiac Cycle[edit]

Systole: The phase of the heartbeat when the heart muscle contracts and pumps blood from the chambers into the arteries.
Diastole: The phase of the heartbeat when the heart muscle relaxes and allows the chambers to fill with blood.

Blood Supply[edit]

The heart itself requires a constant supply of oxygen-rich blood, which is provided by the coronary arteries. These arteries branch off from the aorta and encircle the heart muscle.

Electrical Conduction System[edit]

The heart's rhythmic contractions are controlled by an electrical conduction system, which includes the sinoatrial node (SA node), atrioventricular node (AV node), bundle of His, and Purkinje fibers. The SA node, located in the right atrium, acts as the natural pacemaker of the heart.

Related Pages[edit]

@@ Line 1: / Line 1: @@
-{{Short description|A fictional aircraft model}}
+== Anatomy of the Human Heart ==
-{{Use dmy dates|date=October 2023}}
-'''UR-AK49''' is a fictional aircraft model that has been referenced in various media and literature. It is often depicted as a versatile and advanced aircraft, capable of performing a wide range of missions.
+[[File:UR-AK49.svg|thumb|right|Diagram of the human heart]]
-==Design and Development==
+The human heart is a muscular organ responsible for pumping blood through the [[circulatory system]]. It is located in the [[thoracic cavity]], between the lungs, and is roughly the size of a fist. The heart is composed of four chambers: two upper chambers called the [[atrium|atria]] and two lower chambers called the [[ventricle|ventricles]].
-The UR-AK49 is designed to be a multi-role aircraft, capable of both combat and reconnaissance missions. Its design incorporates advanced stealth technology, making it difficult to detect by radar. The aircraft is equipped with state-of-the-art avionics and weapon systems, allowing it to engage both air and ground targets effectively.
-The development of the UR-AK49 was initiated in response to the need for a new generation of aircraft that could operate in diverse environments and fulfill multiple roles. The design process involved extensive use of computer-aided design (CAD) and simulation technologies to optimize the aircraft's performance and capabilities.
+=== Structure ===
-==Operational History==
+The heart is enclosed in a double-walled sac called the [[pericardium]], which provides protection and lubrication. The heart wall itself is composed of three layers: the outer [[epicardium]], the middle [[myocardium]], and the inner [[endocardium]].
-Although the UR-AK49 is a fictional aircraft, it is often portrayed in various scenarios involving military operations. In these depictions, the aircraft is shown to excel in both offensive and defensive roles, often being a key asset in achieving mission objectives.
-==Technical Specifications==
+==== Chambers ====
-The UR-AK49 is typically described as having the following specifications:
-* Crew: 1 or 2 (pilot and co-pilot/navigator)
-* Length: 20 meters
-* Wingspan: 14 meters
-* Maximum speed: Mach 2.5
-* Range: 3,000 kilometers
-* Armament: Various air-to-air and air-to-ground missiles, bombs, and a 20mm cannon
-==Cultural Impact==
+The heart's four chambers are:
-The UR-AK49 has appeared in several films, video games, and novels, often as a symbol of advanced military technology. Its sleek design and formidable capabilities have made it a popular choice for creators looking to depict futuristic or high-tech military scenarios.
-==Related pages==
+* '''Right Atrium''': Receives deoxygenated blood from the body through the [[superior vena cava]] and [[inferior vena cava]].
-* [[Fictional aircraft]]
+* '''Right Ventricle''': Pumps deoxygenated blood to the lungs via the [[pulmonary artery]].
-* [[Military aviation]]
+* '''Left Atrium''': Receives oxygenated blood from the lungs through the [[pulmonary veins]].
-* [[Stealth technology]]
+* '''Left Ventricle''': Pumps oxygenated blood to the body through the [[aorta]].
-==References==
+==== Valves ====
-{{Reflist}}
-[[Category:Fictional aircraft]]
+The heart contains four main valves that ensure unidirectional blood flow:
-[[Category:Military aviation]]
-[[File:UR-AK49.svg|thumb|right|Illustration of the UR-AK49 aircraft]]
+* '''Tricuspid Valve''': Located between the right atrium and right ventricle.
+* '''Pulmonary Valve''': Located between the right ventricle and pulmonary artery.
+* '''Mitral Valve''': Located between the left atrium and left ventricle.
+* '''Aortic Valve''': Located between the left ventricle and aorta.
+=== Function ===
+The primary function of the heart is to maintain a continuous flow of blood throughout the body, delivering oxygen and nutrients to tissues and removing carbon dioxide and other wastes. This is achieved through the cardiac cycle, which consists of two main phases: [[systole]] and [[diastole]].
+==== Cardiac Cycle ====
+* '''Systole''': The phase of the heartbeat when the heart muscle contracts and pumps blood from the chambers into the arteries.
+* '''Diastole''': The phase of the heartbeat when the heart muscle relaxes and allows the chambers to fill with blood.
+=== Blood Supply ===
+The heart itself requires a constant supply of oxygen-rich blood, which is provided by the [[coronary arteries]]. These arteries branch off from the aorta and encircle the heart muscle.
+=== Electrical Conduction System ===
+The heart's rhythmic contractions are controlled by an electrical conduction system, which includes the [[sinoatrial node]] (SA node), [[atrioventricular node]] (AV node), [[bundle of His]], and [[Purkinje fibers]]. The SA node, located in the right atrium, acts as the natural pacemaker of the heart.
+== Related Pages ==
+* [[Cardiovascular system]]
+* [[Blood pressure]]
+* [[Electrocardiography]]
+* [[Heart disease]]
+[[Category:Anatomy]]
+[[Category:Cardiology]]