Bones & Muscles
Know that the body has a skeleton made of bones inside it that gives the body its shape and protects important organs like the brain (skull) and heart (ribcage), and that muscles attached to bones allow the body to move
What a learner can do afterwards
- State that bones give the body shape, support, and protection
- Name at least three bones or bone groups (e.g. skull, ribcage, spine, leg bones)
- Explain that muscles pull on bones to make the body move
1 · Read
Inside your body are hard parts called bones. All your bones together make up your skeleton.
Your skeleton holds your body up and gives it shape. Bones also protect soft parts inside you.
Feel the top of your head. That hard bone is your skull. It protects your brain inside.
Your ribs curve around your chest like a cage. They protect your heart and lungs. Your spine and leg bones help you stand and walk.
Try bending your arm. Muscles pull on your bones to make you move.
Bones give your body shape and protect it. Muscles pull bones to make you move.
More to read
16.5 Musculoskeletal System
Your body has a skeleton inside it. The skeleton is made of bones. Bones are hard and strong. They hold your body up, like the frame of a house holds up the house. Bones also keep your soft parts safe. Your skull is a bone that protects your brain. Your ribs are bones that protect your heart and lungs. Your muscles are stuck to your bones. When a muscle pulls on a bone, that body part moves. That is how you can walk, jump, and wave your hand.
6.1 The Functions of the Skeletal System
Bones do many jobs for your body. They give your body its shape. Without bones, you would be floppy like a jellyfish. Bones hold you up so you can stand and sit. Bones also protect you. Your skull is like a helmet for your brain. Your ribcage is like a cage that keeps your heart safe. Bones even help you move. Your muscles pull on your bones, and that makes your arms and legs move. Some bones also store good things your body needs, like calcium.
38.1 Types of Skeletal Systems
Many animals have skeletons. A skeleton helps an animal keep its shape, stay safe, and move. Some animals, like crabs, wear their hard skeleton on the outside. It is like a shell. People are different. Your skeleton is inside your body. It is made of bones. Your bones hold you up and protect your heart and brain. Your muscles are attached to your bones. When your muscles pull, your bones move, and so do you.
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Where it sits
Learn first
Nothing; this is a starting point.
Where this leads
Jobs that lean on this skill. Follow one to see everything it is built on.
8 questions wait behind this lesson, each with its answer explained. Every answer feeds the sky: stars light as they are learned, and dim when it is time to come back.