Is taking 3 summer courses to much?

I am thinking about taking 3 courses this summer. They are 12 week courses.
*Anatomy and physiology 1 lecture = 3 credits
*Antony and physiology 1 lab = 1 credit
*Critical thinking/ethics = 2 credits

All courses would be online due to pandemic. I have previously taken 2 courses last summer and did great.
I usually take up to 5 class on a 16 regular term

I really need to take both anatomy 1 courses to be able to enroll next semester for anatomy 2. Should I also take critical thinking or wait?

I would just stick with the anatomy courses and do an excellent job.

Thank you. Yes, I need to pass both anatomy courses to be able to take anatomy 2 and microbiology next semester.

What else are you doing for the summer?

It’s probably too much as a part-time effort alongside a summer job/internship.

But if you’re being a full-time student just like previous semesters, 2-3 courses in 12 weeks is a lower workload than 5 courses over 16 weeks.