Human Reproduction and Development
Human Reproduction Structures
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
**The reproductive system is the only system that
would not result in death of the organism if the
system failed.
**But, it is the ONLY system that ensures the
continuation of a species.
A) Sexual Development
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The result of human reproduction is the union of an
egg and sperm cell, development of a fetus, and
the birth of an infant.
All of these are possible because of the hormones,
organs, and glands of the male and female
reproductive systems.
B) Male Reproductive Structure
The functions of the male reproductive system are to produce and deliver sperm.
The male reproductive glands
(gonads) are called the TESTES.
This is where the male
reproductive hormone,
testosterone, is produced.
They are located in a pouch
outside of the body called the
scrotum.

Why is it necessary for the
testes to be located outside the
body cavity?

The male gamete, the sperm, is
produced in the seminiferous
tubules, which are located
within the testes.

Once produced in the testes,
the sperm travel to the
epididymis. This is a structure
located on top of each testis
where sperm mature and are
stored.

When the sperm are
released from the body, they
travel through the Vas
deferens. This is a duct that
leads away from the testis.

The two vas deferens from
each testis join together and
enter the urethra. This is the
tube that expels both semen
and urine through the penis.

C) Female Reproductive Structure
The functions of the female
reproductive system are to
produce egg cells, receive sperm,
and provide an environment that
is ideal for fertilization of an egg
and the development of an
embryo.

The female reproductive cells, or
gametes, are called egg cells and
are produced in the ovaries.

Inside each ovary are oocytes.
These are immature eggs.

A mature egg is called an ovum
and one is usually released every
28 days. The ovum is
surrounded by follicle cells that
protect the egg.

After the egg is released
from the ovary, it travels
through an oviduct. This is
also known as the Fallopian
tube and is connects to the
uterus.

The uterus, or womb, is
where the baby develops
before birth. It is a
muscular, hollow organ.

The cervix at the lower
end of the uterus has a
narrow opening into the
vagina, which leads to the
outside of the female
body.

Create two flow charts.
THE FIRST ONE SHOULD SHOW THE PATH
OF SPERM FROM THE TIME IT IS PRODUCED
UNTIL IT LEAVES THE BODY.
THE SECOND FLOW CHART SHOULD
SHOW THE PATH OF AN EGG CELL FROM
THE TIME IT IS PRODUCED UNTIL IT IS
FERTILIZED.