cell and reproduction Flashcards
Are all cells the same?
no cells have different jobs and purposes.they also have different shapes
how is the body organised
it is made up of organised systems of increasing complexity. cells are the basic units of life
tissues are groups of the same cells that work together
organs are groups of different tissues that work together
eg cardiomyocyte cell
cardiac muscle tissue
heart organ
circulatory system
what is a sperm cells job and what special features has it got
to fertilise eggs and has a tail so it can swim
were is the egg fertilised
in the ovum
were is the baby grown and developed
uterus
what gives the baby all of its nutrients
placenta
what connects the mother and baby in the womb
umbilical cord
what is puberty
the time when changes happen in your body as you turn into and adult
what are the changes you see in boys during puberty
shoulder and chest broaden
get erections
penis grows
testis grow produce sperm
grow facial and pubic hair
voice deepens
what are the changes you see in girls during puberty
breasts grow
hips widen
produce eggs
have periods
what changes do you see in both girls and boys at puberty
grow taller
sweat more
stinky
spots
pubic hair
emotional changes
feet and hands grow
mood swings
what causes puberty and the changes we see
hormones
what is a hormone
chemical messengers that travel in the blood and trigger different processes
what is the menstrual cycle
the menstrual cycle is a natural process. it is a complex cycle controlled by female hormones that cause regular bleeding .
how many phases does the menstrual cycle have
4
