OUR CIRCULATORY SYSTEM: What are they components and organs?

The circulatory system is made up of the vessels and the muscles that help and control the flow of the blood around the body. This process is called circulation. The main parts of the system are the heart, arteries, capillaries and veins.

As blood begins to circulate, it leaves the heart from the left ventricle and goes into the aorta. The aorta is the largest artery in the body. The blood leaving the aorta is full of oxygen. This is important for the cells in the brain and the body to do their work. The oxygen rich blood travels throughout the body in its system of arteries into the smallest arterioles.

On its way back to the heart, the blood travels through a system of veins. As it reaches the lungs, the carbon dioxide (a waste product) is removed from the blood and replace with fresh oxygen that we have inhaled through the lung.

Heart it's our most important muscle

Heart is the strongest muscle. Your heart is divided into two sides. The right side pumps blood to your lungs where it picks up oxygen. The left side pumps oxygen-soaked blood out to your body. They do not work on their own, but together as a team. The body's blood is circulated through the heart more than 1,000 times per day. Between five and six thousand quarts of blood are pumped each day. Your heart is about the same size as your fist.

Arteries and veins are part of the circulatory system. Here's the definition:

Arteries
Arteries are tough, elastic tubes that carry blood away from the heart. As the arteries move away from the heart, they divide into smaller vessels. The largest arteries are about as thick as a thumb. The smallest arteries are thinner than hair. These thinner arteries are called arterioles. Arteries carry bright red blood! The color comes from the oxygen that it carries.

Veins
Veins carry the blood to the heart. The smallest veins, also called venules, are very thin. They join larger veins that open into the heart. The veins carry dark red blood that doesn't have much oxygen. Veins have thin walls. They don't need to be as strong as the arteries because as blood is returned to the heart, it is under less pressure.

What is that liquidd taht goes by all our body?

Blood is thicker than water and has a little bit salty taste. In an adults body there is 10.6 pints of blood circulating around. In their blood there is billions of living blood cells floating in a liquid called plasma.

Excretory System

OUR EXCRETORY SYSTEM: How does it works?

The Excretory system is the system that rids the body of all its wastes, and involves the lungs to remove carbon dioxide from the body, the large intestine in which solid wastes pass through, and the kidneys which remove the bulk of the liquid waste. Some liquid waste evaporates from the skin, and some leaves through the lungs, which can be seen as your breath condenses on a cold day.

The urinary system is made up of the kidney, the bladder, and three tubes. Liquid waste is produced in the kidneys and stored in the muscular bladder. A kidney is a bean shaped organ about 10 centimeters long and inside each are about 1 million capillary clumps. As blood flows through the capillaries, certain substances move from the blood through the capillary walls into the tubes.

Among the "garbage" and other waste products that are disposed of by the excretory system, are extra salts and minerals. Also, quite a bit of water is filtered out. H20 makes up 95% of the urine. By removing water from the body, the kidneys maintain balance in the blood. In certain illnesses some abnormal substances are found in the urine.

A doctor, called a urologist, can order an analysis or urinalysis of a patient's urine. A urinalysis consists of testing the density, PH, sugar, protein, and blood content of the urine. A microscopic examination of urine is done to look for bacteria, crystals and others substances. Substances found, or not found, are clues to the detective work a doctor must do to diagnose the disease.

How do we breath. The respiratory system.

This is a video that it shows you how do it works your respiratory system.

How do it works the digestive system.

This is a video that it shows you how do it works your digestive system.

The food goes into your body. pas the pharinx and the oesophagus and goes to the stomach. See the video and look what it happens after.

Be careful! It's very disgustin...