THE HUMAN BODY
LEARNING GOAL:
We are learning to identify and understand the various parts and functions of the diverse systems of the human body.
The human body is a complex machine that has many body systems that work together to keep us alive and allow us to function. Each body system has a job to do. Inside a body system are organs, which also each have a specific job in our bodies.
THE DIGESTIVE SYSTEM
The digestive system is in charge of breaking down food and making it into nutrients and energy that our bodies need.
The main parts of the digestive system are:
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Mouth
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Esophagus
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Stomach
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Small intestine
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Large intestine
VOCABULARY
body system
organ
digestive system
esophagus
stomach acid
small intestine
large intestine
respiratory system
trachea
lungs
diaphragm
oxygen
circulatory system
blood vessels
arteries
veins
heart
immune system
white blood cells
nervous system
nerves
spinal cord
musculoskeletal system
skeleton
soft muscles
cardio muscles
skeletal muscles
tendons
ligaments
THE RESPIRATORY SYSTEM
The respiratory system is in charge of our breathing. It takes in oxygen, which is a gas our body uses to function.
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The main parts of the respiratory system are:
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Lungs
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Trachea
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Bronchi
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Diaphragm
THE CIRCULATORY SYSTEM
The circulatory system is in charge of pumping our blood throughout our bodies. It brings oxygen-rich blood to all out of our organs.
The main parts of the circulatory system are:
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Heart
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Blood vessels (veins and arteries)
THE IMMUNE SYSTEM
The immune system is in charge of protecting our body from invaders like germs and bacteria, and fighting off disease.
The main parts of the immune system are:
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Skin
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White blood cells (neutrophils, macrophages, B cells, and Killer T cells)
THE NERVOUS SYSTEM
The nervous system is in charge of controlling all of the functions of your body, as well as helping you think and make decisions.
The main parts of the nervous system are:
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Brain
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Spinal cord
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Nerves
THE MUSCLE AND SKELETAL SYSTEM
The muscular and skeletal systems work hand-in-hand to help us move and keep balanced, as well as help our organs function and protect them from harm.
The main parts of the muscular and skeletal system are:
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Smooth muscles
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Cardiac muscles
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Skeletal muscles
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Bones
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Tendons
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Ligaments