Spermatogenesis and Oogenesis Flashcards
The formation of sperm cells that occurs in the testes where it is produced.
Spermatogenesis
Where does spermatogenesis occur?
Spermatogenesis occurs in the testes in coiled tubes.
Spermatogenesis occurs in the testes in coiled tubes called _.
seminiferous tubules
In humans, how long does spermatogenesis take?
64-75 days
Spermatogenesis begins when these found near the outer wall of the tubules, divide constantly by mitosis…
spermatogonia
Spermatogonia are also called?
diploid cells
Spermatogenesis begins when spermatogonia, the diploid cells, found near the outer wall of the tubules, divide constantly by _, further developing…
mitosis
Spermatogenesis begins when spermatogonia, the diploid cells, found near the outer wall of the tubules, divide constantly by mitosis, further developing into?
primary spermatocytes
These are discharged along with urine. They form on the onset of puberty, then testes start to produce _.
Sperm cells
The life span of sperm cells.
Every after 3 days or 72 hours.
This is hygienic. It serves to make males’ genitals clean. It is a biological process. If this is not done, it will form a pouch that will lead to diseases like UTI and many more; and it would be dirty, stinky since urine is a body waste.
Circumcision
How many chromosomes does diploid have?
46 chromosomes
How many chromosomes does haploid have?
23 chromosomes
Cell division. The process where our cells are divided.
Mitosis
The four stages of Mitosis.
P - Prophase
M - Metaphase
A - Anaphase
T - Telophase
What does spermatogenesis produce?
Spermatogonia
Are spermatogonia matured?
No.
After spermatogenesis produced spermatogonia, it will develop into?
Primary Spermatocytes
Primary Spermatocytes undergo Meiosis I, then further develops into
Secondary Spermatocytes
SPERMATOGENESIS → SPERMATOGONIA → PRIMARY SPERMATOCYTES → SECONDARY SPERMATOCYTES → _ → _
SPERMATIDS; SPERMATOGONIUM
The production of gametes/sex cells.
Meiosis
The common body cells between male and female that undergo mitosis.
Somatic Body Cells
Somatic Body Cells has 46 chromosomes, which is why it is also called _.
diploid cells
2 Categories of Meiosis.
Meiosis I and Meiosis II
The stage where sperm cells and egg cells become 23 cells to be ready for their next phases.
Fertilization
The primary spermatocytes then undergo meiosis I, each producing _, with haploid number of chromosomes.
two secondary spermatocytes
The secondary spermatocytes undergo meiosis II and produce daughter cells, which are also called? They become mature and flagellated to form sperm cells.
spermatids
How long does the maturation process of spermatids usually take?
9 to 10 weeks
Where are sperm cells stored until ejaculation?
Epididymis
The development of an ovum that occurs in the ovary.
Oogenesis
The ovary at birth contains all the _ (from which ova are formed) a female will ever have.
follicles
What reproductive organ at birth contains all the follicles (from which ova are formed) a female will ever have?
ovary
The diploid cells in the ovaries or oogonia undergo _ producing daughter cells.
Mitosis
The diploid cells in the ovaries or oogonia undergo mitosis producing daughter cells called _, each residing in a follicle.
Primary Oocytes
How many primary oocytes are produced when the female baby is born?
Around 2 million primary oocytes
How many primary oocytes remain by the time a female reaches seven years old, since most of primary oocytes are reabsorbed in the body?
300 000
The primary oocytes remain dormant for a time in the _ until it can be triggered hormonally to develop further.
Prophase of Meiosis I
About every 28 days after puberty, _ stimulates one of the dormant follicles to develop and the primary oocyte completes meiosis I.
FSH from anterior pituitary gland
The FSH from anterior pituitary gland stimulating one of the dormant follicles results in daughter cells with?
- unequal division of cytoplasm
- a single secondary oocyte receiving almost all of the cytoplasmic content
- a smaller daughter cell called first polar body with almost no cytoplasm
A smaller daughter cell is called?
first polar body
This is released by the ovary during ovulation. This is one of the events in the menstrual cycle.
Secondary Oocyte
