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Red blood cells The red blood cells (erythrocytes) contain haemoglobin to carry oxygen. (c) Oliver Kim
Wall of a blood vessel The blood vessel carries red blood cells, which are visible. (c) Oliver Kim
Basement membrane of the seminiferous tubule The basement membrane surrounds the cells of the seminiferous tubules. (c) Oliver Kim
Lumen of the seminiferous tubule The sperm cells are then collected in the lumen (the space) of the tubule. (c) Oliver Kim
Head of the spermatozoa The head of the sperm cell carries the DNA of the individual. (c) Oliver Kim
Tails of the spermatozoa The tails of the spermatozoa (sperm cells) beat for movement. (c) Oliver Kim
Blood vessel The blood vessels supply the testes with nutrients and oxygen and remove wastes. (c) Oliver Kim
The testes have two functions, the production of sperm cells and the production of the male hormone testosterone.
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