The mitochondria, in ancient times, used to be a species of it's own. Until one day a unicellular organisms gobbled up a mitochondria and digested it. The mitochondria continued doing it's mechanical functions. (like protein synthesis etc..) Therefore, mitochondria is a living being on it's own sense and hence needs the essential nutrients (like all living beings do) to continue doing it's mechanical functions.
That statement is correct...
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Answer:
Penis: An external part of your reproductive system in males. The cylindrical body is made of a spongy fiberous muscle called corpus spongiosum. It helps protect the penis from hits and the sponge absorbs most of the impact. At the top of the penis is a mushroom shaped structure called glans penis.
The penis also contains no bones despite having a bony like center.
Vas Deferens: Is several ducts which carry sperm from the epididymis to ejaculatory ducts. These ducts are surrounded by smooth muscle and are around 1 foot long. When ejaculating, the smooth muscles surrounding the ducts, contract which shoots the sperm forward.
Testis: Are two oval shaped organs that are contained in a sac called the scrotum. The testes contain and produce sperm cells until the male reaches sexual maturity. The testes also secret testosterone and androgens, these hormones are crucial as they play an important role in sex drive, fertility, bone mass, and muscle mass.
Urethra: Is a muscular tube that conveys semen and urine from the bladder and ejaculatory ducts. In males, the urethra is 7-9 inches long. It can be seperated into 3 parts, the prostatic urethra, the membranous urethra, and the spongy urethra.
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