Examlex
Which of the following is NOT a region of a kidney?
Acrosome
A cap-like structure present over the anterior part of a sperm's head, containing enzymes that help sperm penetrate an egg.
Midpiece
A part of the sperm cell that contains mitochondria, providing energy for movement.
Centriole
A small, cylindrical cell structure in the cytoplasm of animal cells, involved in the process of cell division and in the formation of cilia and flagella.
Nourishment
The provision of food or other substances necessary for growth, health, and good condition.
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