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53 terms

Reproduction/Development

STUDY
PLAY
Sexual Reproduction
2 parents where the offspring can be different than the parents
Asexual Reproduction
1 parent where the offspring looks identical to the parent
Reproduction
To make more of the same kind ( not needed for the survival of an induvidial but needed for the survival of a species
Example of something that undergoes asexual reproduction
bacteria
An example of something that undergoes sexual reproduction
humans
Fertilization
When the sperm and egg unite
Time line of developing child
sperm+egg (gametes)---> Fertilization----> Zygote-----> gestation------> birth
Ovary
Produces eggs (By the hormones estrogen and progesterone)
Ovulation
When the egg is released from the ovary
Oviduct
The tube that lead from the ovaries to the utereus (Where fertilization occurs)
Uterus
where the body/fetus developes (large muscle where placenta forms)
Bladder
stores urine
Urethra
urine comes out here
Vagina
the openening through which the baby comes out
Cervix
The opening to the uterus
Rectum
Stores Solid wastes
Scrotum
Holds testes
Testicles
(Where testosterone is released)- makes sperm
Vas Defrens
Tube thats leads from the Scrotom to urethra
Urethra (Male)
tube that urine and semen leave the body
Penis
Allows for internal fertilization, sperm is realeased inside the femal and increases the changefor sperm to reach the egg
What The Menstrual Cycle is controled by
Hormones, also regulated by negative feedback
Ages of 10-14
When the Mentrual Cycle usually begins in females
Menstrual Cycle
A complex series of events which involves the interaction of the endocrine system and reproductive system
Average Length of the Menstrual Cycle
28 days
Menses
Latin- A month
4 phases of the Menstrual Cycle
Follicle Stag, Ovultion(Day 14) Corpus Luteum Stage, Menstruation- Uterine linging is shed, bleeding begins)
4 Hormoes involves in the Menstrual Cycle
FSH-Follicle Stimulationg hormone LH-Lutenizing Hormone, Progesterone, Estrogen
Menopause
A Perminant cessation of the Menstrual cycle
Pregnacy
A temporary cessation of the Menstrual cycle
Zygote
Chromosomes from the Sperm and eggs combine to form this
Placenta
Provides Nutrients and Proteins to the developing baby inside the womb
Cleavage, Mitosis, Cell Division
After a zygote forms it ungdergoes this
Blastula
A hollow ball of cells
Glastrula
After a zygote undergoes cleavage and forms into a blastula it forms into this and forms the layers Ectoderm, Mesoderm, and the endoderm
Differentiation
When the cells get their different jobs
Aniotic Sac
Cushions the baby
Umbeltical Cord
connects the baby to the placenta
Centromere
Where the Chromatids attach
Chromones
Made up of DNA whih carries cells genetic info passed from one generation to the next sister chromatids
Interphase
Before mitiosis, cell grows and replicates DNA
Propahse
Largest phase where the nuclear envelope disapears, chromosomes are visible, spindle froms fiber that guides the chromosomes where to go
Metaphase
The Chromosomes line up ib the middle of the cell
Anaphase
Seperates centrameres and moves apart from the oppisite poles
Telophase
Cell starts to tear, nucleus starts to form, chromosomes gather at the end of eah cell (clevage begins)
Cytokinesis
Cytoplasm splits (cleavage), this usually happens in telophases, results in 2 idemtical cells with identical number of chromosomes
Cell Division is controlled....
When cells come into contct with other cells they respond by not growing
Cancer
Uncontrolled cell division
Ends up in 2 cells that have the full number of chromosomes
Mitosis
diploid
2n (46 chromosomes in humans
Meiosis
Cell division that ends up with 4 cells that have half the number of chromosomes as the parents, sex cells has the same phases as mitosis just twice
Spermatogenis
Production of Sperm cells in testes
Oogenesis
Production of Egg cells in ovaries