Organs of the body plus reproductive organs

I have been teaching sex and relationship education in Year 6 as part of a unit on organs of the body. The SRE aspect is taught in a lesson on how a baby is conceived and includes how identical twins and non identical twins occur.
It's a passive way to get the pupils to talk about the different parts of the reproductive organs as it is in conjunction with a fascination with twins - although the sex part is secondary, they are more comfortable taking about the organs as it is not the main feature of the lesson.
The attached diagrams are a re-hash of one widely available on Pinterest and other websites. I took a stab at it to make the diagrams more relevant to my lessons.
I use one as a lesson on virus vs bacterial infection and when it is time to take antibiotics... and when not to...
Other lessons are on digestion, muscle and bone names, glands skin & hair (what happens when they go through puberty), respiration and the heart, organs that remove waste and the mystery of the brain and nervous system (more adapted to para / quadriplegic discussions).
You can either put one in the middle of each page in their book and write information around it, or use it as a book itself, made from concertina folding card.
Each of the lessons I back up with Youtube (mostly TedEd) clips and other resources like glow in the dark skeletons (£1 shop at Hallowe'en) with laminated labels for all of the major bone names.