This activity explains to students that heart muscle cells are specialised, and that if they join together to form tissues in a disorganised way in the heart, they cannot do their job properly.

Oxford Sparks is a portal for engaging with a wealth of exciting science taking place across Oxford University. Get more great resources from the Oxford Sparks here and on its website at oxfordsparks.ox.ac.uk. You can also follow on Twitter at @OxfordSparks.

Similar resources

• RSPB Birdwatch – 2026 school resources and survey sheets
• Balancing equations worksheet – How to teach chemical equations
• Cosmetic chemistry – Science of make-up KS4 lesson plan
• Invertase – KS4 chocolate-themed enzyme lesson plan
• Microbes experiment – KS3 science lesson plan