The heart is a muscular organ that pumps blood throughout the body. It is responsible for delivering oxygen and nutrients to the tissues and removing waste products. The heart is divided into four chambers: two upper chambers called atria and two lower chambers called ventricles. The right atrium receives deoxygenated blood from the body, which is then pumped to the right ventricle. The right ventricle pumps the blood to the lungs, where it picks up oxygen. The oxygenated blood then returns to the left atrium and is pumped to the left ventricle. The left ventricle pumps the oxygenated blood to the rest of the body. The heart is regulated by a network of electrical impulses that control its beating. These impulses are generated by a small group of specialized cells located in the right atrium called the sinoatrial (SA) node. The SA node acts as the pacemaker of the heart, initiating each heartbeat. The electrical impulses then travel through the heart, causing the chambers to contract and pump blood. The heart rate can be influenced by factors such as exercise, stress, and medication.
The heart is a muscular organ that pumps blood throughout the body. It is responsible for delivering oxygen and nutrients to the tissues and removing waste products. The heart is divided into four chambers: two upper chambers called atria and two lower chambers called ventricles. The right atrium receives deoxygenated blood from the body, which is then pumped to the right ventricle. The right ventricle pumps the blood to the lungs, where it picks up oxygen. The oxygenated blood then returns to the left atrium and is pumped to the left ventricle. The left ventricle pumps the oxygenated blood to the rest of the body. The heart is regulated by a network of electrical impulses that control its beating. These impulses are generated by a small group of specialized cells located in the right atrium called the sinoatrial (SA) node. The SA node acts as the pacemaker of the heart, initiating each heartbeat. The electrical impulses then travel through the heart, causing the chambers to contract and pump blood. The heart rate can be influenced by factors such as exercise, stress, and medication.
user
The human heart is a four-chambered organ that pumps blood throughout the body, delivering oxygen and nutrients while removing waste. The right atrium receives deoxygenated blood and pumps it to the right ventricle, which sends it to the lungs for oxygenation. The oxygenated blood returns to the left atrium, is pumped to the left ventricle, and finally distributed throughout the body. The heart's rhythm is controlled by electrical impulses originating from the SA node, acting as the pacemaker, and spreading through the heart to stimulate contraction and blood pumping. External factors like exercise, stress, and medication can influence the heart rate.
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: In 1802, Humphry Davy invented the first electric light. He experimented with electricity and invented an electric battery. When he connected wires to his battery and a piece of carbon, the carbon glowed, producing light. His invention was known as the Electric Arc lamp. And while it produced light, it didn’t produce it for long and was much too bright for practical use.

Over the next seven decades, other inventors also created “light bulbs” but no designs emerged for commercial application. More notably, in 1840, British scientist Warren de la Rue enclosed a coiled platinum filament in a vacuum tube and passed an electric current through it. The design was based on the concept that the high melting point of platinum would allow it to operate at high temperatures and that the evacuated chamber would contain fewer gas molecules to react with the platinum, improving its longevity. Although an efficient design, the cost of the platinum made it impractical for commercial production.

In 1850 an English physicist named Joseph Wilson Swan created a “light bulb” by enclosing carbonized paper filaments in an evacuated glass bulb. And by 1860 he had a working prototype, but the lack of a good vacuum and an adequate supply of electricity resulted in a bulb whose lifetime was much too short to be considered an effective producer of light. However, in the 1870’s better vacuum pumps became available and Swan continued experiments on light bulbs. In 1878, Swan developed a longer lasting light bulb using a treated cotton thread that also removed the problem of early bulb blackening

Summarize the text as it relates to the design of the light bulb.
Response: The first electric light was invented in 1802 by Humphry Davy. After him, there was no design fit for commercial application for over seven decades, although other inventors created light bulbs. In 1940 however, British scientist Warren de la Rue developed a light bulb using coiled platinum filament enclosed in a vacuum tube. The high cost of platinum made this design impractical for commercial production. In 1850, Joseph Wilson Swan created a bulb using carbonized paper filaments, but a lack of vacuum and adequate electricity supply shortened its lifespan. However, the availability of a better vacuum in the 1870s enabled Swan to develop a longer-lasting bulb while simultaneously solving the problem of early bulb blackening using treated cotton thread.

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.
