[@SRN-L]

i like how your voice is nice and deep lol sounds weird but its true

[@Jones578]

Thank you for all your vidio's. I have been very ill so missed most hl biology lessons. You have really helped me catch up thank you.

[@client1547]

🙂

[@hpurle]

question: 'testosterone stimulates the development of secondary spermatocytes into mature sperm'. On the last diagram, there was another step whereby spermatocytes became spermatids before becoming sperm- so does testosterone stimulate both steps to happen or just one of them?

[@client1547]

Great

[@funsicle21]

This is perfect! Thank you!

[@misterleescience]

Thanks for stopping by

[@wxrlp]

you still alive?

[@MHiol1]

Good one.

[@blissrose01]

THANK YOU!

[@EatRainbowsNbeHappy]

really appreciate your videos :)

[@SRN-L]

you're the besttttt