Reproductive System

Reproductive System

Purpose, Anatomy, Function (Ms I's class)

Multiple Choice

Boys and girls have the exact same body parts

• True

• False

Why do men and women look different?

The features that make men unique from women, such as this man's beard, are controlled by the sex hormones. The production of the sex hormones is a key role of the male reproductive system.

Multiple Choice

Why do men and women look different?

• brains

• lungs

• heart

• hormones

The Male Reproductive System Functions

Dogs have puppies. Cats have kittens. All organisms reproduce, obviously including humans. Like other mammals, humans have a body system that controls reproduction. It is called the reproductive system. It is the only human body system that is very different in males and females. The male and female reproductive systems have different organs and different functions.

The male reproductive system has two main functions:

Producing sperm.

Releasing testosterone into the body.

Sperm are male gametes, or reproductive cells. When a male gamete meets a female gamete, they can form a new organism. Sperm form when certain cells in the male reproductive system divide by meiosis, resulting in cells with half the amount of DNA as a regular "body" cell. More precisely, sperm cells are haploid sex cells, having one set of chromosomes. Regular body cells are diploid, having two set of chromosomes.

Multiple Choice

There are 46 chromosomes in a diploid human cell, how many are in a human sperm cell?

• 23

• 25

• 36

• 46

Testosterone is the main sex hormone in males. Hormones are chemicals that control many body processes. Testosterone has two major roles:

During the teen years, testosterone causes the reproductive organs to mature. It also causes other male traits to develop. For example, it causes hair to grow on the face and allows for muscle growth. During adulthood, testosterone helps a man to produce sperm.

Multiple Select

Testosterone does what? Pick all that are correct

• causes the reproductive organs to mature.

• causes other male traits to develop

• it causes hair to grow on the face and allows for muscle growth

• helps a man to produce sperm

Multiple Choice

What hormone helps a boy develop into a man?

• Estrogen

• Testosterone

When a hormone is released into the body, we say it is "secreted." Testosterone is secreted by males, but it is not the only sex hormone that males secrete. Males also secrete small amounts of estrogen. Even though estrogen is the main female sex hormone, scientists think that estrogen is needed for normal sperm production in males.

Multiple Choice

What does the word secrete mean

• to dance

• to be released

• to fall down

• to do a particular job

What causes a girl to develop into a woman?

Adult female characteristics, such as breasts, develop during the teen years. What causes this to happen? The development of the female traits is caused by the hormones produced by the female reproductive system

The Female Reproductive System Functions

Most of the male reproductive organs are outside of the body. But female reproductive organs are inside of the body. The male and female organs also look very different and have different jobs. Two of the functions of the female reproductive system are similar to the functions of the male reproductive system. The female system:

Produces gametes, the reproductive cells, which are called eggs in females.

Secretes a major sex hormone, estrogen.

Multiple Choice

What is the MAJOR female sex hormone?

• estrogen

• androgen

• testosterone

Multiple Choice

Males ONLY produce testosterone and females ONLY produce estrogen

• True

• False

One of the main roles of the female reproductive system is to produce eggs. Eggs (Figure below) are female gametes, and they are made in the ovaries. After puberty, females release only one egg at a time. Eggs are actually made in the body before birth, but they do not fully develop until later in life. Like sperm, eggs are produced by meiosis, so they contain half the number of chromosomes as the original cell.

Multiple Choice

What is the purpose of the uterus in the female body?

• To pump blood

• To breathe air

• To hold a fertilized egg and baby

Another role of the female system is to secrete estrogen. Estrogen is the main sex hormone in females. Estrogen has two major roles:

• During the teen years, estrogen causes the reproductive organs to develop. It also causes other female traits to develop. For example, it causes the breasts to grow.

• During adulthood, estrogen is needed for a woman to release eggs. On average, a woman releases one egg each month from her ovaries.

Multiple Choice

What hormone helps a girl turn into a woman?

• Testosterone

• Estrogen

Multiple Choice

If a girl/woman has a hormone imbalance will she have a period?

• Yes

• Not always

The female reproductive system has another important function. After puberty, the female reproductive system must prepare itself to accept a fertilized egg each cycle (about every month). This cycle is controlled by a well-planned and very complex interplay of hormones. If an egg is not fertilized, the system must prepare itself again the next cycle. The female reproductive system also supports a baby as it develops before birth, and it facilitates the baby's birth at the end of pregnancy.

Multiple Select

The female reproductive system... Pick all that are correct

• produces eggs

• secrete estrogen

• supports a baby as it develops before birth

Home

Open in new tab

Copy link

Home

Open in new tab

Copy link