A man has 250 lobules in each testis. Each lobule holds 2 seminiferous tubules…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
A man has lobules in each testis. Each lobule holds seminiferous tubules.
- How many seminiferous tubules are there in one testis?
- How many are there in both testes?
Need a reminder? The key ideaShow
A testis has about lobules, and each lobule holds to seminiferous tubules. The scrotum keeps the testes to below the temperature inside the body. Sperm route: seminiferous tubule, rete testis, vasa efferentia, epididymis, vas deferens, ejaculatory duct, urethra. Leydig cells make androgens. Sertoli cells feed the germ cells.
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Given. lobules in a testis, tubules in a lobule.
Plan. Multiply to get one testis. Then double.
Step 1. One testis. tubules.
Step 2. Both testes. tubules.
Answer: tubules in one testis; in both.
Check. The real number is between and tubules in each lobule. So the total for both testes lies between and , and is inside this range.
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