You could look at it directly as a presentation and discuss the different activities being shown in each of the photos.
I have added a writing task about the different ways people can keep healthy. You could focus on how does keeping healthy in general, mean you have a healthy, longer lasting heart in particular?
I also wrote a presentation about the 31 different ways you could use these photo flashcard resources in your classroom.
You could print off and laminate the photos to make an interesting, eye-catching display about World Heart Day.
The students could also take the laminated photos and sort them into different healthy activities. The students can then discuss what they think about each activity and why it is good for the heart.
The photos could also be used as prompts for creative writing, factual writing or descriptive writing.