testes

My chemo specifically targeted fast growing cells in the body, including testes (where the cancer originated) and hair follicles.

People with this condition have internal testes, a male level of testosterone, and a male level of muscle development.

In a normal system, if SRY is present for XY, SRY will activate the medulla to develop gonads into testes.

Hippopotamuses have a low body temperature of about 35°C, so internal testes work for them.

And testes need to be closely temperature-regulated, so this could be a real issue.

They have XY chromosomes, internal testes, a male testosterone level, and male muscle development.

You are correct, I believe they also feel for any lumps or irregular growth of the testes.

The evolutionary explanation is simple: enough males with external testes successfully reproduce regardless.

For starters, I can't find any credible source saying they have XY chromosomes or internal testes.

Ultrastructural analysis of testes from mice fed on genetically modified soybean.

We want to find explanations and justifications for everything, but it's largely possible that the location of testes actually doesn't matter -- internal, external, whatever.

Sean Testes » A Gentle Intro to Gonads … Maybe?

The germline cells are “chosen” in a very early stage of the embryo, and later they migrate to the ovary/testes.

People who have the chromosomes that correspond to the testes and other related reproductive parts should be described as "male" people.

We have been taught in high school that the reason humans and "all mammals" had external testes was to cool them.

In men they make the testes shrivel, they make you develop "bitch tits", they alter your mood and make you more aggressive.