reproduction in humans

HideShow resource information
sexual reproduction
genetic information from two parents combines to produces a new individual
1 of 48
asexual reproduction
a type of reproduction by which offspring arise from a single organism, and inherit the genes of that parent only; it does not involve the fusion of gametes, and almost never changes the number of chromosomes
2 of 48
the male reproductive system
has two functions; to manufacture the male gametes, and to deliver them to the site of fertilisation
3 of 48
sperm
the male gamete or reproductive cell involved in sexual reproduction manufactured in the testa, which are enclosed in the scrotum
4 of 48
urinogenital system
the organ system of the reproductive organs and the urinary system
5 of 48
ova
the female gametes are produced one at a time by the two ovaries, and then the ovum travels along the oviduct towards the uterus, where it may be fertilised if met with a sperm
6 of 48
oestrogen
a sex hormone that is released into the bloodstream of females and circulates throughout their bodies, and beings the cycle of egg productions and prepares the uterus lining for implantation
7 of 48
testosterone
a sex hormone that is released into the bloodstream of males and circulates around their bodies
8 of 48
puberty
a transitional period between childhood and adulthood
9 of 48
changes in behaviour
girl may become more maternal and attracted to boys
10 of 48
pituitary gland
produces hormones which affect other endocrine organs
11 of 48
pituitary hormone
one specific pituitary hormone stimulates the ovaries to produce oestrogen, which stimulates the development of female secondary sex characteristics
12 of 48
breasts
develop and increase in size, and the ******* get larger
13 of 48
hair
develops under armpits and in pubic region
14 of 48
hips
become broader and pelvis widens and fat is deposited
15 of 48
vagina
becomes larger
16 of 48
oviduct (Fallopian tube)
carries the ovum to the uterus, and fertilisation usually occurs in the first third of the oviduct
17 of 48
funnel of oviduct
collects ovum released from the ovary at ovulation
18 of 48
uterus
is where the foetus develops
19 of 48
ovary
contains follicles which develop the ova, and produces oestrogen and progesterone
20 of 48
cervix
is a ring of muscle which, until birth, keeps the foetus in the uterus, and then relaxes to allow the birth of the baby
21 of 48
vagina (birth canal)
receives the penis during sex, and is the 'way out' for the baby at birth
22 of 48
female gametes
jelly coat - changes at fertilisation to allow entry of male nucleus, haploid nucleus, cytoplasm - contains food stores for the early development of zygote
23 of 48
changes in behaviour
boys may become more aggressive and territorial, and attracted to girls
24 of 48
pituitary hormone
one particular pituitary hormone stimulates the testes to produces testosterone, which circulates in the blood and stimulates the development of male secondary sex characteristics
25 of 48
hair
develops on the chest, under armpits, in pubic region, and on the face
26 of 48
chest
broadens, muscles become larger, and voice becomes deeper as larynx changes in shape
27 of 48
testes
are stimulated to begin production of sperm
28 of 48
penis
becomes larger and scrotum expands to contain larger testes
29 of 48
sperm duct
carries sperm from the tests to the urethra
30 of 48
prostate gland
helps to produce the seminal fluid with makes up 99.5% of the semen
31 of 48
semen
slimy whitish fluid comprised of sperm cells and secretions from the sexual glands released at ****** through the male reproductive organ
32 of 48
urethra
carries semen from the sperm duct to the tip of the penis
33 of 48
scrotum (scrotal sac)
holds the testes outside the body, at the ideal temperature for the formation of sperm
34 of 48
penis
becomes erect when spaces in its structure fill with blood
35 of 48
testis (testicle)
made up of many copied tubes which produce sperm, and the cells between the uses produces testosterone
36 of 48
male gametes
acrosome - contains enzymes to penetrate egg cell membrane, mitochondria - release energy for beating of flagellum, flagellum - eats to move sperm towards ovum, haploid nucleus
37 of 48
copulation
when the penis becomes erect and hard enough to enter the woman's vagina
38 of 48
fertilisation
the joining together of an ovum and a sperm
39 of 48
after fertilisation
the ovum membrane alters to form a barrier to the entry of other sperm, the head of the sperm moves towards the nucleus of the ovum and the two fuse, the fertilised ovum or zygote now starts to divide, and it continues to move towards the uterus
40 of 48
embryo
an organism in early stages of development, before hatching from an egg
41 of 48
conception
he moment when a sperm cell from a male breaches the ovum, or egg, from a female
42 of 48
implantation
the act of the egg setting in firmly to the uterine lining, which occurs approximately 6 or 7 days after fertilisation
43 of 48
placenta
a flattened circular organ in the uterus of pregnant mammals that nourishes and maintains the fetus through the umbilical cord
44 of 48
umbilical cord
a tube-like structure that connects a fetus to the mother's placenta, providing oxygen and nutrient-rich blood and removing waste
45 of 48
contraception
the deliberate prevention of pregnancy
46 of 48
different types of contraception
female sterilisation, IUD, contraceptive pill, spermicide, condom, femidom, cap, morning-after pill
47 of 48
sexually transmitted infections/diseases
gonorrhoea, which can be cured by antibiotics, and AIDS, which there is no cure for
48 of 48

Other cards in this set

Card 2

Front

a type of reproduction by which offspring arise from a single organism, and inherit the genes of that parent only; it does not involve the fusion of gametes, and almost never changes the number of chromosomes

Back

asexual reproduction

Card 3

Front

has two functions; to manufacture the male gametes, and to deliver them to the site of fertilisation

Back

Preview of the back of card 3

Card 4

Front

the male gamete or reproductive cell involved in sexual reproduction manufactured in the testa, which are enclosed in the scrotum

Back

Preview of the back of card 4

Card 5

Front

the organ system of the reproductive organs and the urinary system

Back

Preview of the back of card 5
View more cards

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all DNA and inheritance resources »