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Development of the Heart

Development of the Heart

The development of the human heart, a crucial organ, commences from the mesoderm on the 18th or 19th day after fertilization. This process initiates in the cardiogenic area, a group of mesodermal cells at the embryo's head end, which evolves into elongated strands known as cardiogenic cords. These cords undergo a transformation to form hollow-centered endocardial tubes.
As the embryo undergoes lateral folding, these paired tubes approach each other, merging into a single primitive heart tube by...

Overview of the Heart

Overview of the Heart

The heart, a muscular organ located in the chest, functions as the body's pump, circulating blood through the vascular system. It has four chambers: two atria on top and two ventricles below. The right atrium receives deoxygenated blood from the body and passes it to the right ventricle, which pumps it to the lungs for oxygenation. The left atrium receives oxygenated blood from the lungs and transfers it to the left ventricle, which pumps it to the rest of the body.
The heart's structure...

Anatomy of the Heart

Anatomy of the Heart

The human heart is made up of three layers of tissue that are surrounded by the pericardium, a membrane that protects and confines the heart. The outermost layer, closest to the pericardium, is the epicardium. The pericardial cavity separates the pericardium from the epicardium. Beneath the epicardium is the myocardium, the middle layer, and the endocardium, the innermost layer. There are four chambers of the heart: the right atrium, the right ventricle, the left atrium, and the left ventricle.

Anatomy of the Heart

Anatomy of the Heart

The heart is a hollow, muscular organ approximately the size of a fist, consisting of four chambers. It is enclosed in the pericardium, a fibrous sac with two layers: the visceral and parietal pericardium, separated by a fluid-filled space containing serous fluid to reduce friction.
The heart has three layers: the innermost endocardium, the muscular myocardium, and the outer epicardium, all working together for optimal cardiac function.
Chambers of the Heart
The heart is made up of four...

Location and Orientation of the Heart

Location and Orientation of the Heart

The human heart, despite its modest size and weight, is an organ of remarkable strength and endurance. Roughly the size of a fist, the heart weighs between 250 and 350 grams and is nestled within the mediastinum, the medial cavity of the thorax. It extends obliquely for about 12 to 14 cm, resting on the superior surface of the diaphragm. The heart is positioned anterior to the vertebral column and posterior to the sternum, with two-thirds of its mass lying to the left of the midsternal line.

Heart Valves

Heart Valves

The human heart is a complex organ with an intricate system of valves that regulate blood flow. There are two main types of valves: atrioventricular (AV) valves and semilunar valves.
The AV valves prevent the backflow of blood from the ventricles to the atria during ventricular contraction. These valves function with the assistance of the chordae tendineae and papillary muscles. When the ventricles are relaxed, the chordae tendineae are slack, allowing blood to flow from the atria into the...

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Related Experiment Video

Updated: Jun 4, 2026

Semi-automated Optical Heartbeat Analysis of Small Hearts

Semi-automated Optical Heartbeat Analysis of Small Hearts

Published on: September 16, 2009

The heart beads program.

Kate Alexa Dengler¹, Gabbie Scarfe, Sarah Redshaw

¹Edgar Stephen Ward, The Children's Hospital at Westmead, Sydney, Australia. kated2@chw.edu.au

Journal for Specialists in Pediatric Nursing : JSPN

|February 8, 2011

Summary

The Heart Beads Program uses unique beads to acknowledge children's cardiac condition journeys and procedures. This person-centered care approach aims to reduce stress and anxiety for pediatric patients during their hospital stays.

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Area of Science:

Pediatric Cardiology
Child Psychology
Healthcare Program Development

Background:

Children with cardiac conditions face prolonged hospital stays and numerous procedures.
These experiences can cause significant stress and anxiety due to limited understanding and control.
A dedicated children's heart center aims to provide a consistent care experience.

Purpose of the Study:

To describe the implementation of the Heart Beads Program.
To enrich the hospital experience for children with cardiac conditions.
To recognize and validate children's endurance through procedural milestones.

Main Methods:

Development of the Heart Beads Program within a person-centered care framework.
Distribution of distinctive beads for each procedure, treatment, or event.
Collection of preliminary responses from staff, children, and families.

Main Results:

The program was initiated to provide a tangible recognition of children's medical journeys.
Preliminary feedback from staff, children, and families was gathered.
The program aims to positively impact the psychosocial well-being of pediatric cardiac patients.

Conclusions:

The Heart Beads Program offers a novel approach to person-centered care in pediatric cardiology.
It provides a method for acknowledging and validating the challenging experiences of children undergoing cardiac treatments.
Further evaluation is needed to assess the program's long-term impact on patient and family experiences.