CIRCULATORY SYSTEM

PARTS OF THE CIRCULATORY SYSTEM

• Blood cells
• Heart❤️
• Veins
• Arteries
• Capillaries
• Body cells
• Lungs are considered part of the Respiratory System, but the lungs have a role in the Circulatory System also.

It takes 1 minute for a red blood cell to travel once through the circulatory system. Blood returning from the body cells go to the right side of the heart. The returning blood cells carry CO2 waste. The returning blood enters the upper chamber(right atrium) on the right side of the heart. When the heart beats, the right atrium gets squeezed. The blood gets pushed down to the right ventricle.

Right side of the heart
The next the heart beats, it pushes blood out of the right ventricle to the lungs. The blood flows through tiny capillaries that are touching air sacs in the lungs. The red blood cells release carbon dioxide. The CO2 enters the air and is exhaled. Then the red blood cells take oxygen from the air you breathe in.

Left Side of the Heart
The oxygen-rich blood cells go back to the left side of the heart. Blood from the lungs flows into the left atrium. Next time the heart beats, squeeze his blood into the powerful left ventricle. What do you left ventricle contracts, pumps blood through the arteries to the body. Red blood cells transport oxygen and pick up waste carbon dioxide. Then the cycle starts over again.

GAS EXCHANGE IN THE LUNGS AND CELLS

The human body is made of different kinds of cells. There are nerve cells, muscle cells, lung cells, skin cells and so on. Cells of the same kind, working together to perform a function, is called a tissue. Muscle tissue contracts to produce movement. Muscle tissue contracts to produce movement. Bone tissues give our body structure. Nerve tissue sends electric messages. Each tissue is made of its own kind of cells. But the cells in all tissues need some basic resources.

Cells breakdown sugar to get energy. Cells need oxygen to do the job. One of the by-products of sugar breakdown is the waste gas carbon dioxide. If cells don't get oxygen, they will die. If the cells don't get rid of carbon dioxide, they will die.

Blood flows to the body tissues through the arteries. The blood flows through smaller and smaller arteries, capillaries. Capillaries are only 1/100 millimeters in diameter. Just a little bigger than a red blood cells. So small that red blood cells often have to go single file.

The capillaries touch every cell in the body. Gas exchange takes place sell a sliding past itself. All of the capillary is between them. Oxygen into the cells, and carbon dioxide pass out. Plus self then transport the carbon dioxide to the lungs for disposal.

CREDITS