What is the difference between primary follicle and tertiary follicle? | primary follicles versus tertiary follicles | how does primary follicles differ from tertiary follicle?
Follicular development in female ovary is one of the important biological process leads to formation of mature haploid ovum from germinal epithelium of ovary commonly known as primordial cell. Follicular development start during the embryonic or 6 to 8 months of gestation period of female and at birth time it will be arrested and then begin at puberty after attending the sexual maturity of 12 years age in girls child.
There are several follicles formed during the follicular development’s are primary follicles containing primary oocytes, secondary follicles that contain primary oocytes and tertiary follicles that containing secondary oocyte. After this tertiary follicles develop into Graafian follicles and release secondary oocytes for fertilization with sperm.
All these follicles have some difference in development and structure, but in this topic we explain some maijor difference between primary follicles and tertiary follicles.
What is the primary follicle and secondary follicle?
What is primary follicle? Primary follicle is second stage of follicular development inside ovary of female develop from primordial cell that contain primary oocytes surrounded by single nutritious layer of follicular epithelium commonly known as granulosa cells. This is preantrum follicles that’s have no fluid filled cavity and also it is immature ovarian follicles begin to develop at embryonic period or six to eight months of gestation period.
What is tertiary follicle? Tertiary follicle is Fourth Stage of follicular development inside ovary of female which is developed from secondary follicles that containing secondary oocyte surrounded by Central cavity antrum and diverse layers of membrana granulosa, theta interna and theca externa.
What is the difference between primary follicle and tertiary follicle?
This questions is very important for class 12th Biology students who are preparing for their annual Board, CBSE/ states board and competitive, Neet, medical examinations.
Key difference between primary follicle and tertiary follicle is that primary follicle is an immatured ovarian follicles developed from ogonium of nest cells containing primary oocytes that surrounded by single layer of nutritious cuboidal cells known as follicular epithelium or granulosa cell and it is preantral follicle whereas tertiary follicles develop from secondary follicle containing secondary oocyte, is being larger, more follicular cells, accumulation of fluid in intracellular space called as antrum and that are surrounded by many diverse layer of granulosa cells known as membrane granulosa that surrounded by theca externa and theca interna.
How does primary follicle differ from tertiary follicle?
Primary follicles differ from tertiary follicles in following points:- primary follicles have primary oocytes inside it whereas tertiary follicles have secondary oocyte inside it, 2) primary follicles developed during the embryonic period of girls child and it is arrested at prophase of meiosis -1 whereas tertiary follicles start to developed at puberty, 3) primary follicle are smaller than comparison to tertiary follicles, 4) primary follicles developed from single oogonium whereas tertiary follicles developed from seconadary follicles, and 5) single layer of nutritive cuboidal granulosa cells that surrounding the primary oocytes forms the primary follicles whereas many and diverse layers of theca cells and membrana granulosa celles that surrounding the seconadary oocyte forms the tertiary follicles.
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Primary follicles vs tertiary follicles
How do you compare/ List five differences/ comparison/ distinguish / versus/ between primary follicles and tertiary follicles are following:-
1) Primary follicles developed from oogonium whereas tertiary follicles developed from secondary follicles
2) Single layer of nutritive cuboidal granulosa cells that surrounding the primary oocytes forms the primary follicles whereas many diverse layers of theca cells and membrana granulosa celles that surrounding the secondary oocytes and antrum cavity forms the tertiary follicles.
3) Primary follicle are smaller than comparison to tertiary follicles
4) development of primary follicle begin to start at embryonic stage or gestation period of 6th to 8th month pregnancy whreas development of tertiary follicles begins at puberty of girl child
5) in primary follicles there is no presence or accumulation of fluid in intracellular space that’s why it is known as preantral follicle whereas in tertiary follicles some membrana granulosa cell develop into central cavity called antrum or fluid filled cavity or liquir follicles in intracellular space that nourishes the development of secondary oocyte
6) in primary follicles primary oocyte surrounded by a single layer of granulosa cells whereas in tertiary follicles secondary oocyte surrounded by Antrum and many diverse layers of membrana granulosa and theca cells.
7) primary follicles is immature follicles whereas tertiary follicle is mature.
8) rate of mitotic division in granulosa cell of primary follicles is higher than comparison to membrana granulosa cells of tertiary follicle.
9) first meiotic division start during development of primary follicle where as it is end after formation of mature follicles or tertiary follicles.