A flower is the reproductive part of a plant. It has basically four main parts - Calyx, Corolla, Androecium, and Gynoecium. The flower having all four parts is called complete flower and the flower having absences of any one of them is called the incomplete flower.
Calyx is the first or the outermost whorl of a flower consisting of units called sepals. Calyx helps in photosynthesis because of having the green color pigment called chlorophyll and it also protects flower in its bud stage.
Corolla is the second whorl of a flower consisting of units called petals. Petals are typically brightly colored or white. They attract animals that help in the pollination and they also protect the reproductive organs of a flower.
The androecium is the third whorl of a flower consisting of units called stamens. Stamen is the male reproductive part of a flower. It has two parts, the long and narrow stalk is called filament and the topmost part which is connected with filament is called anther. While filament support anther and anther produce yellowish powders called pollen grains, which contains male sex cell or male gametes.
The gynoecium is the fourth or the innermost whorl of a flower. It bears the female reproductive organ called carpel. Each carpel consists of three parts stigma, style, and ovary. The stigma is the sticky knob at the outer end of the stalk. The style is the portion of the stalk connecting the stigma to the ovary. The ovary is the round base that contains one or more undeveloped seeds called ovules.
Words to know:
Photosynthesis: The process of making food by plants in the presences of sunlight, water, and carbon dioxide is called photosynthesis.
Pollination: The process of transferring pollen grains from the male anther of a flower to the female stigma of a flower is called pollination.
Pollen: Powdery grains that contain the male reproductive cells of angiosperms.
Angiosperm: Plant that produces flowers and seeds.
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