Exploring the human body's structure and movement, we'll dive into...
Physical Education108 views·Updated 2 Sept 2026·2 pagesDetailed Mind Maps of Human Bones and Muscles
Christina @christina_swp
1
of 2
Bones: Structure, Function and Movement
Your skeleton does much more than just hold you up! Bones protect vital organs like your brain and heart, while providing attachment points for muscles via tendons. They form joints (connected by ligaments) that allow both fine and gross movements as they act as levers for your body.
Bones aren't just structural - they're living tissue! They store important minerals like calcium and phosphorus to maintain strength. Inside, bone marrow produces both red blood cells (for oxygen transport) and white blood cells (for fighting infections), increasing production when your body needs them.
The skeleton features different bone types, each with specific purposes. Long bones like the femur generate strength and speed, working as levers. Short bones (carpals in wrists) spread weight loads, while flat bones (skull, ribs) offer protection, and irregular bones (vertebrae) provide both protection and muscle attachment.
Quick Tip: Remember the main movements at joints with this trick - Flexion decreases angles (like bending your arm), Extension increases angles (straightening your arm), Abduction moves away from center (think "aliens abduct"), and Adduction moves toward center.
Your joints enable different types of movement depending on their structure. Ball and socket joints (like your hip) allow the most freedom, while hinge joints (like your elbow) permit movement in one plane. The human skeleton contains 206 bones, from the tiny bones in your ear to the large femur in your thigh.
2
of 2
Muscles: Types, Actions and Functions
Muscles are what give your body the power to move! Voluntary muscles (the most common type) attach to your skeleton via tendons and are under your conscious control - you decide when to contract or relax them. When they contract, these muscles get shorter and thicker to pull on bones.
Your body also contains muscles you don't have to think about. Involuntary muscles work automatically under control of your autonomic nervous system. These include the smooth muscles in your blood vessels that help control blood pressure, and cardiac muscle which powers your heart non-stop throughout your life.
Muscles work in pairs called antagonistic pairs. Since muscles can only pull (not push), they need partners to create opposite movements. When one muscle contracts (the agonist), its partner (the antagonist) relaxes. For example, when your bicep contracts to flex your elbow, your tricep relaxes - and vice versa during extension.
Amazing Fact: Not all muscle fibres are the same! Type I (slow-twitch) fibres are fatigue-resistant with great endurance - perfect for marathon runners. Type IIb fibres are fast-twitch with explosive power but tire quickly - ideal for sprinters.
Different muscles perform specific movements at various joints. Your quadriceps extend your knee (think squats), while hamstrings flex it. Your deltoids abduct your shoulder (raising arm sideways), and your pectorals adduct it (bringing arm toward center). Learning these actions helps you understand how exercises target specific muscles.
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Physical Education108 views·Updated 2 Sept 2026·2 pagesDetailed Mind Maps of Human Bones and Muscles
Christina @christina_swp
Exploring the human body's structure and movement, we'll dive into bones and muscles - the framework that lets us move, protect organs, and perform everyday tasks. This knowledge is crucial for understanding how our bodies work and is essential for...
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Bones: Structure, Function and Movement
Your skeleton does much more than just hold you up! Bones protect vital organs like your brain and heart, while providing attachment points for muscles via tendons. They form joints (connected by ligaments) that allow both fine and gross movements as they act as levers for your body.
Bones aren't just structural - they're living tissue! They store important minerals like calcium and phosphorus to maintain strength. Inside, bone marrow produces both red blood cells (for oxygen transport) and white blood cells (for fighting infections), increasing production when your body needs them.
The skeleton features different bone types, each with specific purposes. Long bones like the femur generate strength and speed, working as levers. Short bones (carpals in wrists) spread weight loads, while flat bones (skull, ribs) offer protection, and irregular bones (vertebrae) provide both protection and muscle attachment.
Quick Tip: Remember the main movements at joints with this trick - Flexion decreases angles (like bending your arm), Extension increases angles (straightening your arm), Abduction moves away from center (think "aliens abduct"), and Adduction moves toward center.
Your joints enable different types of movement depending on their structure. Ball and socket joints (like your hip) allow the most freedom, while hinge joints (like your elbow) permit movement in one plane. The human skeleton contains 206 bones, from the tiny bones in your ear to the large femur in your thigh.
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of 2Sign up to see the content. It's free!
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By signing up you accept Terms of Service and Privacy Policy
Muscles: Types, Actions and Functions
Muscles are what give your body the power to move! Voluntary muscles (the most common type) attach to your skeleton via tendons and are under your conscious control - you decide when to contract or relax them. When they contract, these muscles get shorter and thicker to pull on bones.
Your body also contains muscles you don't have to think about. Involuntary muscles work automatically under control of your autonomic nervous system. These include the smooth muscles in your blood vessels that help control blood pressure, and cardiac muscle which powers your heart non-stop throughout your life.
Muscles work in pairs called antagonistic pairs. Since muscles can only pull (not push), they need partners to create opposite movements. When one muscle contracts (the agonist), its partner (the antagonist) relaxes. For example, when your bicep contracts to flex your elbow, your tricep relaxes - and vice versa during extension.
Amazing Fact: Not all muscle fibres are the same! Type I (slow-twitch) fibres are fatigue-resistant with great endurance - perfect for marathon runners. Type IIb fibres are fast-twitch with explosive power but tire quickly - ideal for sprinters.
Different muscles perform specific movements at various joints. Your quadriceps extend your knee (think squats), while hamstrings flex it. Your deltoids abduct your shoulder (raising arm sideways), and your pectorals adduct it (bringing arm toward center). Learning these actions helps you understand how exercises target specific muscles.
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Our AI Companion is a student-focused AI tool that offers more than just answers. Built on millions of Knowunity resources, it provides relevant information, personalised study plans, quizzes, and content directly in the chat, adapting to your individual learning journey.
You can download the app from Google Play Store and Apple App Store.
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