Urogenital opening: Difference between revisions
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The '''urogenital opening''' is where [[waste]] products of the body and [[sperm|reproductive fluids]] are expelled to the environment outside of the [[body cavity]]. In some lower organisms, including [[bird]]s and many [[fish]]es, discharge from the [[urological system|urological]], [[digestive system|digestive]], and [[reproductive system]]s empty into a common sac called the [[cloaca]]. In more advanced organisms, these three systems are more separated. In the human female, separate orifices have evolved for all three, while in the male, a common "urogenital orifice" discharges both [[urine|urinary]] and reproductive fluids from the [[urethra]]. Essentially birds rub their holes together when mating. |
The '''urogenital opening''' is where [[waste]] products of the body and [[sperm|reproductive fluids]] are expelled to the environment outside of the [[body cavity]]. In some lower organisms, including [[bird]]s and many [[fish]]es, discharge from the [[urological system|urological]], [[digestive system|digestive]], and [[reproductive system]]s empty into a common sac called the [[cloaca]]. In more advanced organisms, these three systems are more separated. In the human female, separate orifices have evolved for all three, while in the male, a common "urogenital orifice" discharges both [[urine|urinary]] and reproductive fluids from the [[urethra]]. Essentially birds rub their holes together when mating. Some organisms, such as monkeys, cleanse their orifices by plunging it with their finger. |
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Revision as of 01:33, 20 February 2007
The urogenital opening is where waste products of the body and reproductive fluids are expelled to the environment outside of the body cavity. In some lower organisms, including birds and many fishes, discharge from the urological, digestive, and reproductive systems empty into a common sac called the cloaca. In more advanced organisms, these three systems are more separated. In the human female, separate orifices have evolved for all three, while in the male, a common "urogenital orifice" discharges both urinary and reproductive fluids from the urethra. Essentially birds rub their holes together when mating. Some organisms, such as monkeys, cleanse their orifices by plunging it with their finger.
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