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Overview


The human body is an amazing thing. It allows us to run, jump, play, cry, talk, write, think, and so much more. Although humans are always evolving, and our bodies change during our lifetimes, understanding the basics of human anatomy is important for everyone. Knowing foundational information about your own body can help you stay healthy and understand why your body is doing what it is!

Skeletal System

Your skeleton is crucial. It helps hold the body up, helps you walk, and protects your organs. You’ve seen skeletons at Halloween, and most science classrooms have model skeletons. But what is your skeletal system? This system is made of bones. Those bones require blood and nourishment just like the rest of your body! Bones are covered with periosteum, a membrane that helps deliver nourishment and keep your bones healthy.

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Muscular System

Muscles are important, but your body has many more muscles than you can see at the gym. Your muscular system allows you to move, helps keep your body upright, produces heat that keeps your body temperature regulated, and can protect your bones and organs. Muscles help you move by contracting, and it is important to make sure that your muscles can contract well. This means cardio as well as strength training/ Don’t forget that your heart is a muscle too!

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Cardiovascular System

Your heart is also part of your cardiovascular system. This system, which delivers blood to the organs, tissues, and cells of your body, is comprised of your heart, arteries, and veins, as well as smaller branches called capillaries and arterioles. Arteries carry blood that is rich in oxygen away from your heart, and veins carry oxygen-poor blood back to your heart. This system is crucial for delivering oxygen to your organs, bones, and skin; while your heart pumping makes the body function.

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Digestive System

Without our digestive system, we would not be able eat, we wouldn’t nourish our bodies, and we definitely wouldn’t get nutrients from our food! The digestive system is made up of your gastrointestinal tract, which is basically a tract that runs from your mouth through your body, passing through your esophagus, stomach, intestines, liver, pancreas, and gallbladder. One crucial part of your digestive system are the bacteria which help you digest food. The digestive system is very complex. It can be impacted by, and depends on, your circulatory, cardiovascular, muscular, and respiratory systems, as well as on hormones and bacteria.

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Endocrine System

The endocrine system is complex but is also crucial to a healthy body. The endocrine system regulates energy and growth as well as how you respond to stress and injury. It plays a huge role in reproduction. This system is made up of glands and organs that regulate and produce hormones and chemicals your body needs such as insulin, testosterone, and estrogen. Your endocrine system also helps regulate your metabolism and can impact how much energy you have.

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Nervous System

The nervous system is responsible for carrying messages from your brain and spinal cord to the rest of your body. Without this system, not only would you not be able to talk or think, but you also couldn’t move. Your brain and spinal cord wouldn’t be able to tell your muscles how to move or breathe since your nervous system regulates breathing. Your brain and spinal cord are connected to nerves that run throughout your body and tell your body what it is supposed to do.

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Respiratory System

The respiratory system is made up of your lungs, airways, and blood vessels, as well as the various muscles that enable you to breathe. This system provides oxygen to your body, something that is essential, and it also makes it possible for you to breathe and eat through your mouth! Your lungs are protected by your skeletal and muscular systems, and the system is also dependent on your nervous system.

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Immune/Lymphatic Systems

The immune system and lymphatic system, systems that work together throughout the body to help regulate your body’s response to germs, bacteria, and illness as well as infection, are harder to identify on an anatomy chart, but they are still important. New research is also being done that suggests that the brain is connected even more intricately to the immune system and lymphatic system than previously thought, making this system fascinating for scientists. Lymphatic systems remove waste from the body and brain, but these functions are still being studied.

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Urinary System

Your urinary system is crucial for removing waste products, like those left behind by food or drink, for your body. It is made up of the kidneys, bladder, and urethra, and is essential for keeping your body healthy. Without properly functioning kidneys, for example, you will get sick, possibly get infections, and overwhelm your immune system. Your kidneys also help regulate your blood pressure.

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Reproductive System

The reproductive system is important even for those of us not planning on having children. Your reproductive system impacts the hormones your body produces as well as the overall health of your organs.

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Integumentary System

This system is comprised of your skin, sweat and oil glands, hair, and nails. These organs are there for protection and sensory perception as well as to keep your muscles, organs, and skeleton covered! This system also helps your body regulate temperature, provides vitamin D synthesis, and detects pain. It’s also the largest organ system.

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A Review of the Humany Body – An Anatomy Guide for Kids and Adults
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