Sample Paper 1 by Teachoo

[Reading] Question 1 (i) Important You are here

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[Grammar] Question 3 (i)

[Grammar - Gap Filling] Question 3 (ii) Important

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[Literature - Extract Question] Question 6 (A) - i

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[Literature] Question 8 (i)

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[Literature] Question 11 (A) Important

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English Class 9
Teachoo Sample Paper
  • Sample Paper 1 by Teachoo

Read the following text.

Human Heart

The human heart (heart) is a complex organ that pumps blood throughout the body. The heart is the main component of the circulatory system, which also includes the blood vessels and the blood. The heart is the source of life, as it delivers oxygen and nutrients to the cells and removes carbon dioxide and waste products from them. The heart is also involved in other functions, such as regulating blood pressure, maintaining body temperature, and responding to emotions.

The heart is also a fascinating and mysterious subject of study and exploration. The heart is composed of about 2 billion cardiac muscle cells, which are specialized cells that contract and relax rhythmically. The heart is divided into four chambers, such as the right atrium, the right ventricle, the left atrium, and the left ventricle, each with its own functions and roles.

The heart is connected to the rest of the body through the blood vessels, which carry the blood to and from the organs and tissues. The heart is also influenced by various factors, such as genes, hormones, nutrition, environment, and experience, which shape its structure and function throughout life.

The heart is also adaptable and resilient, which means that it can adjust and recover from new situations and challenges. The heart is a unique platform for conducting research and experiments in various fields, such as cardiology, physiology, psychology, and artificial intelligence. The heart offers a window into the nature and origin of health, disease, and emotion.

The heart also provides insights into various cardiovascular and neurological disorders, such as heart attack, stroke, arrhythmia, and heart failure. Some of the experiments that have been conducted on the heart include measuring heart rate, stimulating heart regions, recording heart sounds, mapping heart connections, and creating heart models.

The heart also hosts various educational and outreach activities, such as hosting heart awareness week, sending heart facts, and launching heart games. The heart is expected to remain a subject of interest and curiosity for many years to come, as there are still many unanswered questions and unsolved mysteries about its workings and potential. The heart faces various challenges and risks, such as heart injury, heart disease, heart ageing, and heart hacking. The heart also requires regular maintenance and care, which are performed by the individual or by medical professionals. The heart is a remarkable achievement of evolution and nature, and a testament to the diversity and complexity of life on Earth.

The heart has contributed to the advancement of science, technology, and culture, and has inspired millions of people around the world. The heart has also paved the way for future innovations and discoveries, such as heart transplantation, heart regeneration, and heart simulation. The heart is a legacy of humanity’s quest for knowledge and understanding of ourselves and the world.

 

(i) Select the option that correctly identifies the name of the organ and the number of cardiac muscle cells it contains. 

(a) Human heart, 2 billion 

(b) Human lung, 2 million 

(c) Human liver, 2 trillion 

(d) Human kidney, 2 thousand

 

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CA Maninder Singh is a Chartered Accountant for the past 14 years and a teacher from the past 18 years. He teaches Science, Economics, Accounting and English at Teachoo