Every card in Human body systems, Year 7: more practice
The whole deck, in order — so you can read it through before your child ever sees it.
- Which part of the skeleton protects the brain?
The skull
HintThink of what covers your head.
WhyThe skull is made of fused bones forming a hard case around the brain.
- Which bones protect the heart and lungs?
The ribs (rib cage)
HintThey curve around the chest.
WhyThe rib cage forms a protective cage and moves when you breathe.
- Which part of the skeleton protects the spinal cord?
The backbone (vertebral column)
HintIt is made of many small bones.
WhyThe vertebrae have a hole through them where the spinal cord runs. The pads between them let the back bend.
- Which job of the skeleton is being done when the ribs form a cage around the heart and lungs?
Protection
HintThink of what a cage does for something soft inside it.
WhyThe ribs, skull and backbone guard soft organs: the ribs shield the heart and lungs, the skull the brain and the backbone the spinal cord.
- Which mineral makes bones hard?
Calcium
HintMilk gives you lots of it.
WhyCalcium and phosphate give bone its strength. Bone also contains tough fibres that stop it being brittle.
- What joins a muscle to a bone?
A tendon
HintIt is tough and does not stretch much.
WhyA tendon is a strong cord of tissue. When the muscle contracts it pulls on the bone through the tendon.
- Why must muscles work in pairs?
A muscle can only pull, so another muscle is needed to pull the bone back
HintMuscles cannot push.
WhyA muscle can only contract and pull. One muscle bends a joint and its partner straightens it again.
- The quadriceps muscle at the front of the thigh straightens the leg. Which muscle at the back of the thigh bends the knee?
The hamstring
HintIt is the muscle pair partner.
WhyThe quadriceps and hamstring form an antagonistic pair. When one contracts the other relaxes.
- What happens to the length of a muscle when it contracts?
It gets shorter (and fatter)
HintContract means to pull together.
WhyA muscle contracts and shortens, which pulls on the bone it is attached to.
- Muscles that work in opposite pairs are called ____ muscles.
antagonistic
HintThe word means working against each other.
WhyThe biceps and triceps are an example. When one contracts the other relaxes.
1★ KS3-BIOL-HUM-0023
2★ KS3-BIOL-HUM-0024
3★ KS3-BIOL-HUM-0025
4★ KS3-BIOL-HUM-0026
5★ KS3-BIOL-HUM-0027
6★ KS3-BIOL-HUM-0028
7★ KS3-BIOL-HUM-0029
8★ KS3-BIOL-HUM-0030
9★ KS3-BIOL-HUM-0031
10★ KS3-BIOL-HUM-0032
Keep what you learn
Here, nothing is saved. In your child’s own sky every card is scheduled — it comes back just before they’d forget it — and the professor who wrote it is one tap away.