Reading comprehension No.4

1. The excretory system is very important to your body and only has a few parts. In a similar way to removing solid waste from your body, you must also get rid of fluids. You know the results of the excretory system as urine. Urine is the result of the excretory system balancing the amount of water and salts in your body.

2. Because you could die from a heat stroke.

3. Your liver filters the nitrogen out of your blood, changing it into urea. Without your liver,you could die of nitrogen poisoning.
4. If you're drinking a lot of water, your blood will have more water in it. Your kidneys can tell. They send only the right amount of water back into blood. The small portion of liquid that remains behind becomes urine.
5. If wastes build up in your blood and cells, your body becomes toxic and deadly.

Reading comprehension No.3

1. Bone cells combine with other bone cells to created the bone tissues.

2. An organ is a group of tissues that work together to do a certain job, for the body. Some of the human body's organs include the stomach,lungs, heart, kidneys, brain and liver.

3. Respiratory and circulatory system.

4. Respiratory system. The human respiratory system is a series of organs responsible for taking in oxygen and expelling carbon dioxide. The primary organs of the respiratory system are lungs, which carry out this exchange of gases as we breathe.

5. The respiratory includes the lungs and all the body parts that allow us to breathe in oxygen and exhale carbon dioxide. The circulatory system includes the heart and all the body parts that help move around the blood around the body.

Reading comprehension No.2

1. They help us fight diseases.
2. They are the largest blood vessels. They both carry carbon dioxide.
3. Oxygen and carbon dioxide
4. The main idea in this passage is all about the blood vessels and hearts, also it tells us the function of it on how it works.
5. Hemoglobin is found in disc-shaped cells called red blood cells

Reading comprehension No.1

1. Circulatory system takes care of our breathing
2. Lungs, nose, mouth, air
3. They diffuse oxygen into the blood and receive carbon dioxide.
4. When you exhale
5. Your diaphragm, a large muscle under your lungs, pulls down. This gives plenty of room so you can get their air you need.