Summarize the key information about the anatomy and functions of the human heart presented in the following text:

The human heart is a remarkable organ that pumps blood throughout the body, providing oxygen and nutrients to every cell. It is a muscular organ located in the chest cavity, slightly offset to the left side. The heart consists of four chambers: two atria (upper chambers) and two ventricles (lower chambers).

The right atrium receives deoxygenated blood from the body and pumps it into the right ventricle. The right ventricle then pumps the blood into the lungs, where it becomes oxygenated. The oxygenated blood returns to the left atrium and flows into the left ventricle, which is the heart's main pumping chamber. The powerful contraction of the left ventricle propels the oxygen-rich blood through the aorta and into the systemic circulation, delivering oxygen and nutrients to all tissues and organs.

The heart is composed of specialized cardiac muscle cells called cardiomyocytes, which are arranged in a unique pattern that allows the heart to contract and relax in a coordinated fashion. This rhythmic contraction and relaxation are controlled by the heart's electrical system, which generates electrical impulses that travel through the heart and trigger the muscle cells to contract.

The heart is also equipped with a system of valves that ensure the one-way flow of blood through the chambers and prevent backflow. These valves include the mitral and tricuspid valves, which control the flow of blood between the atria and ventricles, and the aortic and pulmonary valves, which regulate the outflow of blood from the ventricles.
Summarize the key information about the anatomy and functions of the human heart presented in the following text:

The human heart is a remarkable organ that pumps blood throughout the body, providing oxygen and nutrients to every cell. It is a muscular organ located in the chest cavity, slightly offset to the left side. The heart consists of four chambers: two atria (upper chambers) and two ventricles (lower chambers).

The right atrium receives deoxygenated blood from the body and pumps it into the right ventricle. The right ventricle then pumps the blood into the lungs, where it becomes oxygenated. The oxygenated blood returns to the left atrium and flows into the left ventricle, which is the heart's main pumping chamber. The powerful contraction of the left ventricle propels the oxygen-rich blood through the aorta and into the systemic circulation, delivering oxygen and nutrients to all tissues and organs.

The heart is composed of specialized cardiac muscle cells called cardiomyocytes, which are arranged in a unique pattern that allows the heart to contract and relax in a coordinated fashion. This rhythmic contraction and relaxation are controlled by the heart's electrical system, which generates electrical impulses that travel through the heart and trigger the muscle cells to contract.

The heart is also equipped with a system of valves that ensure the one-way flow of blood through the chambers and prevent backflow. These valves include the mitral and tricuspid valves, which control the flow of blood between the atria and ventricles, and the aortic and pulmonary valves, which regulate the outflow of blood from the ventricles.
user
The passage provides a detailed overview of the human heart's anatomy and functions. It describes the heart as a muscular organ located in the chest cavity, consisting of four chambers: two atria and two ventricles. The text outlines the path of blood flow through these chambers, with deoxygenated blood entering the right atrium, flowing to the right ventricle and then to the lungs for oxygenation. The oxygenated blood returns to the left atrium, enters the left ventricle, and is then pumped out into the systemic circulation by the powerful contraction of the left ventricle. The passage also explains the unique structure of cardiac muscle cells (cardiomyocytes) that enable the coordinated contraction and relaxation of the heart, controlled by the heart's electrical system. Additionally, it mentions the heart's valves that ensure one-way blood flow and prevent backflow.
assistant
Generate a series of (instruction, response) pairs that are similar in context and structure to the example provided below. Each pair should consist of a concise instruction followed by an appropriate, detailed response. The instruction should pose a clear task or question, while the response should provide a comprehensive answer or solution that could be understood by someone with a basic understanding of the subject.

Example pair: 
Instruction: Please write a summary, in simple language, of who Daisy Eagan is using the following:

Throughout her multi-decade career, Tony award-winner Daisy Eagan has dazzled audiences from the stage to television and film, and with her writing. Next stop – time to take over the podcast world.
 
At age eleven, Eagan became the youngest actress to win a Tony Award for Best Performance by A Featured Actress for playing Mary Lennox in “The Secret Garden.” In 2016, Eagan returned to “The Secret Garden” to play Martha for the 25th anniversary concert production at Lincoln Center and at the Shakespeare Theatre in Washington, DC. Eagan also appeared on Broadway in “Les Miserables” and “James Joyce's The Dead,” and most recently on stage she starred in the First National Tour of Stephen Karam’s Tony-winning play, “The Humans.”
 
On television, Eagan can be seen on Freeform’s critically-acclaimed series “Good Trouble.” Additional television credits include HULU’s “The Path,” HBO’s “Girls,” CBS’ “The Mentalist,” “Without a Trace,” “Ghost Whisperer,” “The Unit” and “Numb3rs.”
 
A published award-winning writer with a loyal and growing audience, Eagan is a fierce fighter and activist for women's and LGBTQ rights. She is a rousing voice in political arenas and continues to fight for change throughout her literary career. She has written op-eds for publications including HuffPost and Playbill.com and had a column for USA Today Network’s The Journal News.
Response: Daisy Eagan is an award-winning stage and television actress, writer, and activist, and now can add podcaster to her list of roles. At only 11 years old, she won a Tony Award, she was the youngest actress to win such a prestigious award. She has appeared in several TV series, including The Path, Girls, and The Mentalist. Eagan is also an award-winning writer, activist, and a rousing voice in politics. 

Your task is to generate more pairs that maintain this level of clarity and detail. The topic is Summarization. Write a long text of instruction by yourself, then summarize the given instruction in a response. Ensure that the responses are informative and accurate, suitable for an educational context. 

Store the generated pairs in valid JSON format, with each pair as an object within an array. Each object should have two key-value pairs: "instruction" and "response". For instance: 

{"contents": [{"instruction": "text", "response": "text"}, {"instruction": "text", "response": "text"}, ...]} 

Remember to maintain consistency in the format and ensure the generated pairs are diverse and cover a broad range of subjects. You must return the response in the asked format and you must not add any additional text in your response.
