Nervous System

The nervous system is that thing that allows us to think, remember, feel, and move.

The nerve cells are called neurons, this have three parts

1.- Receiver *receives information from enviroment and other neurons

2.- Cell body *controls the neuron

3.- Sender *send information from other cells

They way that the nervous system works are in 5 steps and those are:

1. neuron in the ear hears a sound
2. receiving neuron carries the message to the brain
3. brain thinks about the message and fells the body to do something
4. motor neuron will carry the message from the brain
5. muscle move

This have two big division and those are:

1.control neurons system: brain and spinal cord brain control the body.
spinal cord-carries information to the brain

2.peripheral nervous system
nerves-groups of neurons that carry information from spinal cord to body

Digestive Sistem

The pats of the digestive system are:
1.Mouth
2.Esophagus
3.Stomach
4.Small Intestine
5.Large Intestine
6.Rectum.

HOW IT WORKS:
The digestive system work basically trow the mouth and ending in the rectum. The first step is when you eat food you break it with your teeth and tongue in your mouth.
Next the food go to the esophagus the food travels down into the the stomach basically what the stomach do is kill bacteria and food by acids. The small intestine brake the food with enzymes, nutrients are absorbed into blood. The large intestine dried the food and turned

Immune System

The people usually get sick from the germs, which are bacteria, viruses, worm......
The way that the germs work is by getting into the body and infecting cells, which can kill the cells and we get more sick.
The mos common illnesses are the flu, cold, and food poisoning.
The people usually get sick from eating bad food, from other people, dirty surfaces, but out immune system protects us from germs.
the first defenses that we have are:

• Skin - Keeps germ from gething inside body

Stomach acid - Kill bacteria on your food.

we also have specific defenses and those are the white blood cell that travel around the body and eat at the germs.

Circulatory System

The function of the circulatory system is to move oxygen and nutrients around the body.

This is very important because we need blood to deliver sugar and oxygen to cells so cells can create arergy. Also the blood removes C02

*Respiratory System*

-The respiratory system is used to breathe.

*We breathe to get oxygen which is used to make energy in cells.

*The parts of our body that we use to breathe are:

1. The nose
   
2. Mouth
   
3. Trachea
   
4. Lungs.

*They way that it works is that the air goes in the nose down the trachea, and fills up little balloons in the lungs called alvedi.

"Body Organization"

All the living things are made up of simple parts that build the whole organism.
The order of those is the next one:
" Cells --> Tissues --> Organ Systems --> Organism "

Cells:
those are two types of cells with different functions the name of those are: "Prokaryote" this are the most simple, the other is the eukaryote this are like plants or animals. All of the prokaryote cells have the same characteristics that are: 1. nucleus 2. vaculoe 3. cell membrane 4. cytoplasm