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Wave-like muscle contractions that move food through the digestive tract.

Multicellular, eukaryotic organisms of the kingdom Plantae, that produce energy through photosynthesis.

The round opening in the front of the eye. The pupil changes size to let light into the eye.

A plural of penny, which is a unit of currency.

A type of depression that many parents experience after having a baby.

A muscular area that supports the pelvic organs.

Modified leaves that surround the reproductive parts of flowers, often brightly coloured or unusually shaped to attract pollinators.

Multicellular, eukaryotic organisms of the kingdom Plantae, that produce energy through photosynthesis.

A number or ratio expressed as a fraction of 100.

A muscular area that supports the pelvic organs.