Year 3 2023-24 Skeleton Knowledge Organiser

Key Vocabulary

healthy in a good physical and mental condition

nutrients substances that living things need to stay alive and healthy energy strength to be able to move and grow

Nutrient Found in... (examples) What it does/they do

carbohydrates provide energy

saturated fats

types of fats, considered to be less healthy, that should only be eaten in small amounts

protein helps growth and repair

unsaturated fats

fats that give you energy, vitamins and minerals

• Living things need food to grow and to be strong and healthy.

• Plants can make their own food, but animals cannot.

• To stay healthy, humans need to exercise, eat a healthy diet and be hygienic.

• Animals, including humans, need food, water and air to stay alive.

fibre

helps you to digest the food that you have eaten

fats provide energy

vitamins

keep you healthy

keep you healthy

minerals

water

moves nutrients around your body and helps to get rid of waste

Animals Including Humans

Key Vocabulary

vertebrate animals with backbones

invertebrate animals without backbones muscles soft tissues in the body that contract and relax to cause movement tendons cords that join muscles to bones

joints

areas where two or more bones are fitted together

Skeletons do three important jobs:

• protect organs inside the body;

• allow movement;

• support the body and stop it from falling on the floor.

Skeletal muscles work in pairs to move the bones they are attached to by taking turns to contract (get shorter) and relax (get longer).

vertebrate

endoskeleton – a skeleton on the inside of the body that supports and protects it

contract relax

invertebrate

exoskeleton – a skeleton on the outside of the body that supports and protects it

hydrostatic skeleton – a skeleton made up of a fluid-filled compartment in the body called a coelom, mainly found in softbodied animals