Circulatory System - ESL worksheet by Teacher Claudia M. - Free Printable

Problem Analysis:

The worksheet focuses on the circulatory system and asks questions related to its components and functions. The image provided shows a simplified diagram of the circulatory system, with labels for different parts such as arteries, veins, and the heart. The task is to answer four questions based on the information given in the image and the text.

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Solution:

#### 1. What does the heart do?
- Answer: The heart pumps blood around the body.
- Explanation: The heart is a muscular organ that acts as a pump. It contracts rhythmically to push blood through the blood vessels (arteries, veins, and capillaries) to deliver oxygen, nutrients, and other essential substances to cells throughout the body. It also helps remove waste products like carbon dioxide.

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#### 2. What are the names of the two types of tubes that carry the blood?
- Answer: Arteries and Veins.
- Explanation:
- Arteries: These are blood vessels that carry oxygen-rich blood away from the heart to the rest of the body. They have thick walls to withstand high pressure.
- Veins: These are blood vessels that carry oxygen-poor blood back to the heart. They have thinner walls and valves to help blood flow against gravity.

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#### 3. What are the main parts of the circulatory system?
- Answer: The main parts of the circulatory system are:
1. The Heart: Acts as the pump.
2. The Blood Vessels: Include arteries, veins, and capillaries.
3. The Blood: Carries nutrients, oxygen, waste products, and carbon dioxide.

- Explanation: The circulatory system is composed of these three primary components:
- Heart: The central organ responsible for pumping blood.
- Blood Vessels: Transport blood throughout the body.
- Blood: The fluid that carries essential substances and waste products.

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#### 4. What's the function of the blood?
- Answer: Blood carries nutrients and oxygen to all parts of the body, and it carries away waste materials and carbon dioxide.
- Explanation:
- Carrying Nutrients and Oxygen: Blood transports oxygen from the lungs to tissues and delivers nutrients (e.g., glucose, amino acids) absorbed from the digestive system.
- Removing Waste Products: Blood collects waste products like carbon dioxide (produced during cellular respiration) and other metabolic wastes and transports them to organs like the kidneys and lungs for elimination.

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Final Answers:

1. The heart pumps blood around the body.
2. Arteries and Veins.
3. The main parts are the heart, blood vessels (arteries, veins, capillaries), and blood.
4. Blood carries nutrients and oxygen to all parts of the body and removes waste materials and carbon dioxide.

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Boxed Final Answers:

1. The heart pumps blood around the body.
2. Arteries and Veins.
3. The main parts are the heart, blood vessels (arteries, veins, capillaries), and blood.
4. Blood carries nutrients and oxygen to all parts of the body and removes waste materials and carbon dioxide.

$$
\boxed{
\text{1. The heart pumps blood around the body.} \\
\text{2. Arteries and Veins.} \\
\text{3. The main parts are the heart, blood vessels (arteries, veins, capillaries), and blood.} \\
\text{4. Blood carries nutrients and oxygen to all parts of the body and removes waste materials and carbon dioxide.}
}
$$