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Flower Anatomy and Functions
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Flower Anatomy and Functions
Flowers attract insects for pollination
External Parts
Sepals
Functions
Sepals are the green parts of the flower that cover and protect flower bud before it opens.
Petals
Functions of Flowers #1
Petals are really leaves that are modified to attract insects for flower pollination.
Functions of Flowers #3
Flowers produce fruit to nourish and protect the seed
Functions of Flowers #2
Flowers produce seeds for sexual reproduction
Internal Parts
Pistil
(female parts of the flower)
Flowers...ETC
Style
Stigma
The style holds up the stigma and connects it to the ovary.
Stamen
The stigma is the sticky part on top of the style where insects leave pollen.
(Male parts of the flower)
Anther
More flower anatomy
The anther is a sac-like structure that contains pollen and the male sex cells.
Ovules
Ovary
The ovules are the eggs or female sex cells that become seeds if fertilized.
The ovary if fertilized becomes a fruit.
Corolla
Calyx
Complete Flowers
Corolla is all auxiliary parts of the flower not including reproductive organs. The collective term for all petals of a flower.
Calyx is the external usually green or leafy part of a flower. It is also the collective term for all sepals of a flower.
Complete flowers have both male and female parts.
Filament
The filament is a short stalk that holds up the anther.
Receptacle
Incomplete Flowers
Receptacle is the enlarged tip of a stem on which a flower is born.
Incomplete flowers have only male or female parts.
Fruit
Fertilization and Pollination
The fruit serves as protection for the seeds.
Fertilization
Pollination
Pollination is the transfer of pollen from the anther to the stigma
Fertilization is when pollen travels down the style, joining the sperm and the ovule.
The function of the fruit is to help with seed dispersal.
Cross-Pollination
Self-Pollination
Cross-pollination is the transfer of pollen from the stamen to the stigma of one flower to a flower on another plant
Self-pollination is the transfer of the pollen to the stigma of a flower on the same plant