or rather its easy to only multitask when
what u are doing are all in 1 - the com.
zzz. dun believe me?
try figuring out math while talking
to someone on the com and at the same
time study fertilisation.
lik wtf! brain's gonna explode anytime.
and you noe what. i've finally confirmed it.
SS SUCKS TO THE FKING CORE.
i reli hate SS lah.
bahs. irritating. i dun mind studying physics.
at least i understand after i read a few more times.
and why do i hafta read more on it?
cause dearest HAHAHA cant ruddy teach.
forget it. i cant be bothered with her.
but at least at the end of the day, i still can
understand hao bu hao. but SS. dunno why leh.
feel lik slamming the textbook on the floor
whenever i see it. lik slam it on the freaking floor.
or throwing it down from my flat.
why do i hafta noe all those rubbish in the textbook,
lik ruddy hell. RARHS!
and i haven touch maths at all yet.
wanna die sia. or rather going to die -.-
but well, afterall i have my motivation to study for math :]
so its okie! i will study study study and memorise ALL
the formulae. jiayou lowchuanyun xD
meanwhile lemme jus recap abit on physics.
formulae:
v = u + at
s = ut + 0.5at^2
v^2 = u^2 + 2as
f = ma
d = m/v
pressure = F/A
pressure in liquids = h(density)g
pressure in Pa = mmHg x 10^-3 x 13600kg/m^3 x 10
moments = f x d
heat capacity = Q / change in temp
specific heat capacity = Q /(change in temp)(mass)
latent heat of fusion/vaporisation = specific latent heat of fusion/vaporisation x mass
v = f x (lambda)
time = 1/frequency
Q(charge) = IT
V=IR
V = W/Q
P = IV = I^2R = V^2/R
P = E/T
e = mc^2 where c = 3 x 10^8m/s
shd be correct lah hor.
thats about all i can remember. arbish.
jus studied the placenta thingy.
so here it is.
some of the cells in the embro will form projections called the villi. the villi attached itself onto the uterus wall. other cells of the embryo will form the amnion. however most of the cells will differentiate to form the fetus. the villi attaches itself firmly to the uterus wall. the mother also form projections. these projections are blood spaces which are filled with the mother's blood. these two sets of projections grow closely together and form the placenta. the fetus is connected to the placenta by an umbillical cord. the umbillical cord consists of the umbillical artery and the umbillical vein. excahnge of substances take place within the placenta. oxygen and other substances lik glucose, amino acids and antibodies then diffuse into the umbillical vein. waste substances lik carbon dioxide and urea is tranferred from the umbilical artery into the mother's blood circulation. besides being a place for exchange of substances to take place, the placenta helps to keep the two blood circulations separate and it also helps to produce progesterone.
why are the two blood circulations separated?
1. the mother's blood is at high pressure and thus this might damage the fetus's capillaries.
2. to prevent agglutination of the blood if they are of different blood groups
3. to prevent transfer of bacteria and viruses from the mother to the baby.
chemicals to abstain from:
1. smoking - nicotine may cause the fetus to be borne prematured.
2. alcohol - the baby borne may be small and have deformed body.
AIDS - accquired immune deficiency syndrome
HIV - human immunodeficiency virus
pituitary gland in the brain stimulates production of FSH(follicle stimulating hormone) which is in charge of the development of the follicle and also the production of oestrogen. oestrogen helps in the repair of the uterus lining after menstration.
progesterone
1. maintains thickness of uterus lining
2. keep the uterus lining spongy
3. keep the uterus vascularised. ( blood capillaries to supply nutrients)
if the ovum is not fertilised, menstration takes place on the 14th day of cycle.
dead unfertilised egg together with blood and uterus lining is lost.
did all these digust you? i bet it did.
see what kinda disgusting stuff we learn? LOL
wellwell, for the benefit of you ppl out there, i shall
talk about genetics now ;]
yesyes.
mutation is a spontaneous and sudden change in the structure of a gene or the number of chromosomes.
i shall not continue le. off to find my dardar le HAHAHA.