Examlex
________ are mixtures of clay, sand, and bitumen.
Skin
A body covering that acts as a primary barrier against external pathogens and helps in thermoregulation and sensation.
Seminiferous Tubules
Narrow, coiled tubules within the testes where spermatogenesis, the process of sperm production, occurs.
Testosterone
A hormone produced by the testes that maintains the male reproductive structures and male characteristics such as deep voice, body hair, and muscle mass.
Cells
The smallest structural and functional units of organisms, which can exist independently or as part of a tissue, organ, or organism.
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