the human reproduction

THE HUMAN REPRODUCTION

Reproductive System

·       Functions

The major function of the reproductive system is to make sure that the human species survives. The four main functions of the human reproductive system are:

1.    To produce egg and sperm cells,

2.    to transport and sustain these cells,

3.    to nurture the developing offspring,

4.    and to produce hormones.

·       Major Organs

In the human reproductive system, the major organs include the external genitalia and many internal organs including gamete producing gonads.

- The external genitalia are the penis and vulva and the gamete producing gonads are the testicles and ovaries.

- These organs produce the egg and sperm cells (gametes) and produce hormones.

- These hormones are needed in the maturing of the human reproductive system, the development of sexual characteristics.

- In the males, the major organ of the reproductive system is the penis

- In the females it is the vagina.

·         How it works

Reproduction couldn't happen without organs called the gonads. The female gonads are the ovaries, which produce eggs. The male gonads, testicles, produce sperm.

·         Reproduction Stages

1.   Fertilization:  -Occurs in upper 1/3 of Fallopian tube

-Once one sperm enters, egg membrane changes

-Fertilized egg = zygote

2.   Implantation: - Implanted into thick walls of uterus

-Chorion membranes dig into uterus to form placenta

- Embryo supported via umbilical cord

- Once pregnant, progesterone levels stay high in mom

3.     1^st Trimester:

-          Heart develops first

-          Neural tube develops

-          All body systems appear by Week 8 – Now a Fetus

4.     2^nd Trimester:

-          Mostly growth

-          Looks more like a baby

-          Some preemies survive at this stage

5.     3^rd Trimester:

-          More growth

-          Kicking, rolling, stretching

-          Eyes open – Week 32

-          Lungs mature

-          Rotates to head-down   position

6.   Birth

-          Labor

a.     Uterine contractions begin

b.    Cervix dilates to 10 cm.

-          Birth

c.     Uterus pushes baby through vaginal canal

-          Placenta delivered after

Daniel Couto Seller 6º-B

Thermal Energy

Thermal Energy

Now I am going to talk about thermal energy, I hope you like it.
 
What is thermal energy?
Thermal energy is what we call energy that comes from the temperature of matter. It is the energy that comes from heat. This heat is generated by the movement of very small particles within an object. The faster this particles move, the more heat is generated, and the slower this particles move, the less heat is generated. We cannot discuss thermal energy without touching on temperature. But you can't  forget that heat and temperature are not the same thing!

The process:
1) Thermal power stations burn fuels.
2) Combustion heats water that is converted into steam.
3) Steam moves the turbine and generates electricity.  
 
Thermal energy results in something having an internal temperature, and that temperature can be measured, for example, in degrees Celsius (Cº) or Fahrenheit on a thermometer. 

 

Examples of thermal energy:

•       A 12 ounce glass of water at 70 degrees has more thermal energy than a 12 ounce glass of water at 60 degrees.                                                     

• Adding ice to a glass of water causes the temperature of the water to decrease because the thermal energy in the water makes the ice melt. 

• A grill gives off thermal energy by burning propane. 
•  The sun's thermal energy heats our atmosphere.                       

Thank you for your atention!
By: Elsa Baixeras Benarroch 6ºA 

THERMAL ENERGY

I´m going to talk about the thermal energy :

Thermal energy is often referred to as heat. The thermal energy of matter depends on how fast the atoms or molecules are moving. The faster they are moving, the more thermal energy they possess. Therefore, the temperature of the matter would be higher. 

Thermal energy is a form of kinetic energy, which is the energy due to motion .

The motion os thermal energy it usually not visible , but we can feel or see it effects . We use thermal energy to cook our food and heats our homes , and we use it to generate energy .

Thermal energy results in something having an internal temperature, and that temperature can be measured - for example, in degrees Celsius or Fahrenheit on a thermometer. The faster the particles move within an object or system, the higher the temperature that is recorded.

EXAMPLES THERMAL ENERGY : 

*A 12 ounce glass of water at 70 degrees has more thermal energy than a 12 ounce glass of water at 60 degrees.

*A grill gives off thermal energy by burning propane.

*Adding ice to a glass of water causes the temperature of the water to decrease because the thermal energy in the water causes the ice to melt.

*The sun's thermal energy heats our atmosphere.

*Thermal energy from a hot stove is transferred to a metal pot and causes the water molecules to move faster increasing the temperature of the water.

BY : ANA PASCUAL 

THERMAL POWER STATION

WHERE IS PRODUCE THE ELECTRICITY???

Electricity is produced is power stations and the transported power lines. There are differents types of power stations depending on the source of energy that they use. There are very differents types of electricity but I'm going to splain one of them. That is THERMAL:

☀️☀️☀️☀️☀️☀️☀️☀️☀️☀️☀️☀️☀️☀️☀️☀️☀️☀️☀️☀️☀️☀️☀️☀️☀️☀️☀️

THERMAL POWER STATIONS....

Burn fuels. Combustion heats water that is converted into steam. Steam moves the turbine and generates ELECTRICITY.

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THERE ARE THERMAL POWER PLANTS TOO

Thermal power plants is a power plant where steam is used to drive a  steam turbine. This turbine is connected the an electrical generator. After this, the water is condensed. 

 

THE COMPONENTS ARE:

1).Cooling tower                                10).Steam control valve

2).Cooling water pump                       11).High pressure steam turbine

3).Transmission line                            12).Deaerator

4).Step up                                        13).Feedwater heater

5).Electrical generator                        14).Boiler steam drum

6).Low pressure steam turbine             15).Superheater

7).Condensate pump                          16).Forced draught (draft) fan

8).Surface condenser                          17).Reheater

9).Intermediate pressure steam turbine  18).Combustion air intake

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HOW MANY TYPES OF THERMAL ARE????

There are three types of thermal:

🔸Conduction: Heat transfer between objects that are touching.

🔸Convection: Heat transfer hot air and cold air.

🔸Radiation: Heat transfer from electromagnetic waves.

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                                                    PHOTO

      

BY: PAULA LOPEZ DIAZ