Reproduction notes

Alternative transcript:

the urethra. [transport] Penis : in intercourse, the penis transports sperm from the male into the female vagina. [urination and intercourse] 7! J Pi Testis : produces sperm and synthesizes a hormone called. 'testosterone' [Production] The Female reproductive system! -Oviduct/Fallopian tube : •Ovary uterus -cervix vagina the system: sit infront of reproductive Bladder urethra Ovary produces eggs and releases one, once a month, for roughly. 40 years after puberty. Also produces the hormones. estrogen' and 'progesterone'. [Production] Oviduct: Transport the ova from the ovary to the uterus each. month. [ transport ] Uterus: Hold and nourish the developing foetus prior to birth. storage] Cervix separates the uterus from the vagina, allowing fluids to flow in and out of the uterus. Also opens and closes to allow childbirth. [barrier] ! G e.g. Humans e.g. Fish 5. vagina: receives penis during intercourse and holds sperm until they pass into the uterus. Also, provides a passage- way for blood and mucosal tissue from the uterus during a womans monthly period, and for childbirth. Fertilisation Fertilisation is the fusion of the nuclei of two haploid gametes to produce a diploid zygote, which divides to form an embryo. There are 2 types of fertilisation Internal and external ↳ Internal fertilisation occurs inside the body of the female. parent and produces few eggs. The chances of fertilisation are high and there is (mostly) lots of parental care after birth. ↳ External fertilisation occurs outside the bodies of the parents. and produces lots of eggs. The chances of fertilisation are low and there is little to no parental care after- birth. Female male 123 cell chromosomes) Sperm cell (23 T : chromosomes) Fertilisation zygote (46 chromosomes in 2 sets = 23 pairs) Quinz Embryo (46 chromosomes in 2 sets = 23 pairs) ic !G Reproduction in Flowering plants Pollen Petals stem ∙nectary. sepal anther -Stigma -ovary avule Pollen Male gamete Stamen Petals Brightly coloured to attract pollinators [attraction] Filament stamen Stigma: sticky bulb that collects pollen and starts growing them. [Collection] Ovary produces female sex cells / gametes, known as ovules. [Production] ovule Female gamete that forms the seeds of flowering plants after pollination. Anther produces male sex cells/gametes, known as pollen. [production] Male reproductive organ of flowering plants, consists of anther for pollen development and filament which transmits water and nutrients, and aids position for pollination. [ Production, position, transport] ! Ji Nectary : : Produces sugary nectar which attracts pollinators. (insects /animals). [production, attraction] Se Pal Protect the unopened flower bud Pollination is the transfer of pollen from the anthers of one flower to the stigma of another. There are 2 types : self pollination, and cross pollination, where wind and insects are the main pollinators. Insect Pollinated : Brightly coloured Strong scent. stamens found inside the flower. Process : male nucleus ovary wind Not brightly coloured. no scent stamens found outside the flower. Pollen grain stigma Pollinated: male nucleus travels down pollen tube to the female nucleus inside the ovule. ovate containing female nudeus. D!