Biology- Reproductive Systems

Ovaries
-description - left& right abdomen.
-function- Produce eggs/ova and hormones e.g. estrogen and progesterone.
Oviduct/fallopian tubes
-function- during ovulation, an ovary releases an egg into the fallopian tubes next to it.
Uterus
-function- expands many times during pregnancy to hold growing fetus.
-description- pear-shaped organ with a muscular wall and lining.
cervix
-description-lower portion of the uterus that opens into the vagina
-function-during labour, the cervix expands to about 10 cm in diameter
Vagina
-descrption-it is a tube-like organ that leads to the outside of the body
-function- the birth of the baby fllows it's path.



Scortum
Testis
sperm duct/ vas deferens
Urethra
penis
epididymi
seminal vesicle
prostate gland

Biology- Menstrual cycle

In which days does MENSTRUATION occur?
1st - 6th

How long does the menstruation LAST?
6 days

When is the egg RELEASED?
on the 14th day.

Biology-CHANGES IN PUBERTY

The start of periods is known as Menarche.
Oaries contain thousands of eggs/ova
PITUITARY gland relseases HORMONES that stimulates OVARIES to produce OTHER HORMONES called ESTROGEN and PROGESTORONE.
The EFFECTS of HORMONES are physical maturation, growth and emotions.

Chapter 9 : Generating Ideas

i)shape borrowing
ii)SCAMPER.

S-Subsitute
C-Combine
A-Adapt
M-Minify/ Macnify
P-Put to other uses
E-Eliminate
R-Reverse/ Re-arrange

Biology : Sexully Tansmitted Infections

DnT Chapter 5 :mechanism

WHAT IS A MECHANISM?
A MECHANISM IS CONSIDERED AS A "SYSTEM" WHICH CONVERTS A GIVEN "INPUT" into an "OUTPUT".

INPUT

process

output

FUNCTIONS OF MECHANISM

1. Type of movement
2. Place of movement
3. Speed of movement
4. Direcion of movement
5. Distance of movement
6. Amount of force movement provides

A basic types of movement

1. linear motion- Motion in a st. line e.g. motion of a train
2. Rotary motion- Circular motion e.g. a bicycle wheel
3. Reciprocating motion- Repeatinf forwards & backwards motion e.g piston in a car engine
4. Oscillating motion- repeating forward & backwards in a circular motion e.g. the motion of a clock pendulum

SCHEMATIC DIAGRAMS

LINKAGES

-They are connected to LEVERS and PIVOTED BARS used to transmit FORCE & MOVEMENT
-Only Linear and oscillating motions can be transmitted
-Linkages are IMPORTANT as they allow forces to be transmitted where they are needed. Thus, they can change the DIRECTION , SIZE OF THE FORCE or MAKE THINGS at the SAME time

Geography! sec 2-chpt 6

WHY IS THERE A LIMITED SUPPLY OF LAND?
-Not all land are readily avaliable for use-on 30% of the earth's surface is made out of land.
-land maybe reserved for certain uses

WHY IS THERE A RISING DEMAND FOR LAND?
-population growth
-increasing demand for housing
-growth of industries
-developement of transport systems
-increasing dmeand for more arable land

RESPONSES TO THE RISING DEMAND OF LAND.
-increasing the price of land.
-increasing the supply of land.
**land clearance
**reclaimation