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Human Body Systems
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- The human body is made up of multiple interacting systems.
- We will learn about the circulatory, digestive, respiratory and muscular systems.
- It takes ALL of your body systems working together to help living things survive.
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Discussion Questions
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Before VideoWhat are body systems?ANSWER
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A body system is a group of organs and tissues that work together to do a job for the body, such as circulating blood or digesting food.
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They interact or work together so that the body can perform many different functions such as breathing and moving. Your body would not work if the systems did not work together.
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When we chew our food it helps us physically break down the food into smaller pieces. This makes it easier for it to pass through our digestive system and for the body to extract nutrients from it.
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There are many examples. Some common ones include bike riding, running, walking fast or even dancing!
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When we breathe, we take oxygen into our lungs. Red blood cells spread the oxygen from our lungs throughout our entire body, where it is used in the production of energy. (That energy powers the body.)
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There are 11 main systems in the human body, but you don't need to memorize them unless you are a doctor.
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After VideoWhat would happen if one body system did not interact with the other systems?ANSWER
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It would be hard for the body to perform its important functions. Since all systems are interconnected, if one does not work this affects how the others will function too.
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When the heart rate increases more blood is pumped through circulatory system. This blood is sent to the muscular system to help your muscles work and keep the body moving.
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The left side of the heart receives blood from the lungs, which contains oxygen. The right side of the heart has blood with less oxygen. This is because the oxygen has been used up to help power your other body systems.
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They get shorter in size, which plays a role in helping a person move.
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Nutrients from food digested in the stomach are absorbed as they pass through the small intestine. Then the large intestine helps absorb water and remove waste from the body. The small intestine is four times longer than the large intestine - Wow!
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Food: The digestive system takes in food and breaks it down, then the circulatory system sends the nutrients to all parts of the body.
Water: The digestive system also takes in water which ends up in your blood. The circulatory system distributes it around your body.
Air: Taken in by your respiratory system. The oxygen in the air passes into your circulatory system.
Shelter: Found or built using your nervous system, muscular system, skeletal system and more.
Sleep: While you sleep, all your systems are still working, though some work more than others during this time.
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Vocabulary
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Body Systems
DEFINE
All the systems within a living thing that work together to help it survive.
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Heart Rate
DEFINE
The number of times your heart beats each minute.
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Blood Vessels
DEFINE
A structure of thin tubes that carry blood throughout the body.
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Circulatory System
DEFINE
Pumps blood throughout the body providing it with oxygen and removing waste.
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Respiratory System
DEFINE
Its main component is the lungs. It gets oxygen into your blood stream.
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Muscular System
DEFINE
Made up of all your muscles, it helps us perform actions.
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Digestive System
DEFINE
Made up of the stomach, intestines, and other components. It allows us to break down food and absorb its nutrients.
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Nutrients
DEFINE
Provide living things with energy and building blocks to grow.
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Body Systems
DEFINE
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Reading Material
Download as PDF Download PDF View as Separate PageDEFINITION OF HUMAN BODY SYSTEMSA body system is a group of organs that work together to perform a specific function. The human body has 11 body systems. The systems studied in elementary school are usually the circulatory system, respiratory system, muscular system, digestive system, and nervous system. The other systems are just as important but more complex, so they are studied at higher grade levels. They are the endocrine system, immune system, lymphatic system, reproductive system, skeletal system, and urinary system.
To better understand how the human body systems work….
DEFINITION OF HUMAN BODY SYSTEMS. A body system is a group of organs that work together to perform a specific function. The human body has 11 body systems. The systems studied in elementary school are usually the circulatory system, respiratory system, muscular system, digestive system, and nervous system. The other systems are just as important but more complex, so they are studied at higher grade levels. They are the endocrine system, immune system, lymphatic system, reproductive system, skeletal system, and urinary system. To better understand how the human body systems work….LET’S BREAK IT DOWN!
The human body is made up of multiple interacting systems.
Each system in the human body has a special function. Your skeletal system gives your body support and structure, so you can stand up. Your immune system helps you stay healthy by fighting off diseases. Each of these systems also interact with each other. For example, the bones in your skeletal system would not be very useful without the muscular system to help them move around. And how would your muscles know where to move your bones if your nervous system didn’t tell them?
The human body is made up of multiple interacting systems. Each system in the human body has a special function. Your skeletal system gives your body support and structure, so you can stand up. Your immune system helps you stay healthy by fighting off diseases. Each of these systems also interact with each other. For example, the bones in your skeletal system would not be very useful without the muscular system to help them move around. And how would your muscles know where to move your bones if your nervous system didn’t tell them?The circulatory system pumps blood through your body.
The circulatory system consists of your heart and blood vessels. The heart’s job is to pump blood throughout your body.
The left side of the heart takes oxygen-rich blood from the lungs and pumps it to other parts of the body to use. The right side of the heart pumps blood to the lungs to add oxygen to it.
The heart has a very busy job! When you are resting, your heart pumps between 60-100 times each minute. When you are exercising, it pumps much faster to deliver blood to your muscles.
The heart is responsible for getting the oxygen to your muscles, but it is the respiratory system’s job to provide the oxygen. This means that the circulatory system is directly linked to the respiratory system.
The circulatory system pumps blood through your body. The circulatory system consists of your heart and blood vessels. The heart’s job is to pump blood throughout your body. The left side of the heart takes oxygen-rich blood from the lungs and pumps it to other parts of the body to use. The right side of the heart pumps blood to the lungs to add oxygen to it. The heart has a very busy job! When you are resting, your heart pumps between 60-100 times each minute. When you are exercising, it pumps much faster to deliver blood to your muscles. The heart is responsible for getting the oxygen to your muscles, but it is the respiratory system’s job to provide the oxygen. This means that the circulatory system is directly linked to the respiratory system.The respiratory system gathers oxygen and removes carbon dioxide.
The main part of the respiratory system is the lungs. It is the lungs’ job to bring air into and out of the body. Oxygen from the air you inhale moves through small blood vessels and enters the bloodstream. It then hitches a ride on red blood cells and travels to all parts of the body.
The blood coming back to the lungs contains carbon dioxide. When you exhale, you remove carbon dioxide which your body does not need anymore.
The respiratory system gathers oxygen and removes carbon dioxide. The main part of the respiratory system is the lungs. It is the lungs’ job to bring air into and out of the body. Oxygen from the air you inhale moves through small blood vessels and enters the bloodstream. It then hitches a ride on red blood cells and travels to all parts of the body. The blood coming back to the lungs contains carbon dioxide. When you exhale, you remove carbon dioxide which your body does not need anymore.The muscular system allows the body to move.
You have over 600 muscles in your body. Muscles are attached to bones and are controlled by nerves that communicate with the brain. Movement takes place when a muscle gets shorter (contracts).
Most muscles work in pairs, allowing movement in more than one direction. For instance, there are two sets of muscles that move your arm. When you lift your arm up, your bicep contracts. At the same time, the muscle on the back of your arm, called the tricep, relaxes.
The muscular system allows the body to move. You have over 600 muscles in your body. Muscles are attached to bones and are controlled by nerves that communicate with the brain. Movement takes place when a muscle gets shorter (contracts). Most muscles work in pairs, allowing movement in more than one direction. For instance, there are two sets of muscles that move your arm. When you lift your arm up, your bicep contracts. At the same time, the muscle on the back of your arm, called the tricep, relaxes.The digestive system breaks down food to release nutrients.
Digestion begins when we break food down into little pieces in our mouth with the help of teeth, the tongue and saliva.
After that, food travels down the esophagus and into the stomach, where it’s further broken down by stomach acids.
From the stomach, it heads to the small intestine. Here, your body removes nutrients it needs from food, and sends the nutrients to parts of the body through the circulatory system.
Finally, the digested food is sent to the large intestine, out of your body... and beyond!
The digestive system breaks down food to release nutrients. Digestion begins when we break food down into little pieces in our mouth with the help of teeth, the tongue and saliva. After that, food travels down the esophagus and into the stomach, where it’s further broken down by stomach acids. From the stomach, it heads to the small intestine. Here, your body removes nutrients it needs from food, and sends the nutrients to parts of the body through the circulatory system. Finally, the digested food is sent to the large intestine, out of your body... and beyond! -
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List 3 of the 11 human body systems and describe what they do.
When your muscles work harder, what happens to your heart and breathing rates?
Pick 3 body systems and explain how they work together while you are running.
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