Growth and

Development!

By Jamie Pelow, Kelvin Cosgrave

and Max Challenger!

Fertilization!The process occurs mostly in the female reproductive system, the vagina/ fallopian tubes/ uterus. Some of the process comes from the male reproductive system, the sperm to fertilize the egg.

The fertilization process occurs usually when a couple wants to bring a child into the world. Or when single mother want a baby they go to doctors to get a sperm donor so they can raise/care for the baby for them selves.The fertilization process is very important because with out it the human spices would go extinct. We use it to reproduce and bring children into the world to live and reproduce (female) or provide sperm to reproduce (male). To continue the human life cycle.

Fertilization, Process!The process of fertilization is quiet simple, the

very first step is for the sperm has to injected

into the woman (baby carrier), next the millions

of sperm are in the vagina on the hunt for a egg

(ovum). At travels through the cervix, then

enters the uterus (the womb). After the sperm

cells journey through the fallopian tube, soon

they reach the egg witch has been set free from

the ovary and is waiting to be fertilized. All

sperm cells that reach the egg will fiercely try

and puncture the ovum's wall (membrane).

Only one sperm will be able to infiltrate the egg.

The sperm is only half a life, the eggs is the

other half you need both to successfully create

a new life. It will now travel from the fallopian

tube to the uterus. For 9 months the eggs with

stay there and develop a life of a baby!

The Menstrual

Cycle/Ovulation

When periods (menstruation’s) come regularly, this

is called the menstrual cycle.

The menstrual cycle occurs in the uterus in the woman's abdomen.

Menstruation is the term given to the periodic discharge of blood, tissue,

fluid and mucus from reproductive organs in females. Menstruation usually lasts from 3-6 days every month. It is caused by a sudden reduction in the hormone estrogen and progesterone.

A regular menstrual cycle means that important parts

of your body are working correctly. The menstrual cycle gives women important body chemicals, called

hormones, to keep them healthy. It also prepares your body for pregnancy each month.

Sper

mat

ogen

esis

How it occurs: Spermatogenesis is a process the male primary

germ cells go through, and produce a number of cells called the

spermatogonia, which the primary spermatocytes are derived.

Each primary spermatocyte divides into two secondary

spermatocytes, and each secondary spermatocyte into two

spermatids or into young spermatozoa. These develop into

mature spermatozoa, also called sperm cells. The primary

spermatocyte gives rise to two cells, the secondary

spermatocytes, and the two secondary spermatocytes by their

subdivision produce four spermatozoa.

Where it occurs: It occurs in the male testes and epididymis in a specific order, and it takes

approximately 64 days. Spermatogenesis takes place within several structures of the male

reproductive system. The initial stages occur within the testes and progress to the epididymis

where the developing gametes mature and are stored until ejaculation. The seminiferous

tubules of the testes are the starting point for the process, where stem cells adjacent to the

inner tubule wall divide in a centripetal direction—beginning at the walls and proceeding into

the innermost part, or lumen—to produce immature sperm. Maturation occurs in the

epididymis and involves the acquisition of a tail and hence motility.

SpermatogenesisWhy it’s important: Spermatogenesis is highly

dependent upon optimal conditions for the

process to occur correctly, and it is

essential for

sexual reproduction. When it occurs: It starts at puberty and usually continues

uninterrupted until death, although a slight decrease can be

found in the quantity of produced sperm with increase in age.

The entire process can be broken up into several distinct

stages, each corresponding to a particular type of cell.

What is the process: The

process is the sperm

production in the testes,

Bibliography

http://www.menstruation.com.au/

periodpages/menstrualcycles.html

http://www.womenshealth.gov/faq/

menstruation.cfm

http://deerparkhpe.wikispaces.com/7-1+HEALTH+2010-11