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TEKS 10A: Describe the interactions that occur among systems that perform the functions of regulation, nutrient
absorption, reproduction, and defense from injury or illness in animals.
How do systems interact to
perform reproduction in animals?
• Animals undergo either asexual or sexual reproduction.
Asexual reproduction produces offspring identical to the parent.
Sexual reproduction produces offspring with genetic variations,
which may increase the ability of a species ability to adapt and
survive environmental changes.
• Proper interactions between the nervous and reproductive
systems are critical to successful reproduction. Animals’
reproductive cycles can be affected by their nervous systems’
responses to changes in length of daylight, seasons, tides, or
moon phases.