EMBRYO SAC Meaning and
Definition
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Embryo sac is a term used in botany to refer to a structure that is found within the ovule of a flowering plant. It is a part of the female reproductive system and is essential for sexual reproduction in these plants. The embryo sac is specifically located within the ovule's nucellus, and it is where fertilization takes place.
The embryo sac is a large, oval-shaped structure, typically consisting of eight cells. These cells are arranged in three distinct regions within the sac, namely the egg apparatus, the central cell, and the antipodal cells. The egg apparatus contains an egg cell and two synergids, which are involved in attracting and guiding the pollen tube during fertilization. The central cell contains two polar nuclei and is responsible for eventually developing into the endosperm, a nutrient-rich tissue that nourishes the developing embryo. The antipodal cells are usually located at the opposite end of the sac and have unclear functions.
During pollination, pollen grains are transferred to the stigma of the flower, where they germinate to produce pollen tubes. These tubes grow down through the style and reach the embryo sac, where one sperm cell fuses with the egg cell to form the zygote (fertilized egg), and another sperm cell fuses with the polar nuclei to initiate endosperm development.
In summary, the embryo sac is a crucial structure within the ovule of a flowering plant that is responsible for fertilization and the subsequent development of the embryo and endosperm. It plays a critical role in the sexual reproduction of these plants.
Common Misspellings for EMBRYO SAC
- wmbryo sac
- smbryo sac
- dmbryo sac
- rmbryo sac
- 4mbryo sac
- 3mbryo sac
- enbryo sac
- ekbryo sac
- ejbryo sac
- emvryo sac
- emnryo sac
- emhryo sac
- emgryo sac
- embeyo sac
- embdyo sac
- embfyo sac
- embtyo sac
- emb5yo sac
- emb4yo sac
Etymology of EMBRYO SAC
The term "embryo sac" is derived from a combination of the words "embryo" and "sac".
The word "embryo" comes from the Greek word "embryon", which means "young one" or "to swell". In biology, an embryo refers to the early stage of development of a multicellular organism, specifically after fertilization and before it becomes a fetus.
The word "sac" has Latin origins, coming from the Latin word "saccus", meaning "bag" or "sack". In the context of biology, a sac refers to a small, bag-like structure that contains or encloses something.
Therefore, when these two words are combined, "embryo sac" refers to the structure that encloses or contains the embryo in the female reproductive system of flowering plants.
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