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The Circulatory System And Its Function
Transcript of The Circulatory System And Its Function
& its function
The functions of the circulatory system are:
Transport gases, like oxygen from the lungs to cells around the body and carbon dioxide from the cells to the lungs.
Transport nutrients like glucose.
Transport wastes from cells to organs that play the role of eliminating them.
It contains cells that fight infections and defend against foreign bodies.
Maintains the pH levels and ionic concentration of fluids in the body.
Helps maintain the body temperature, this is especially important in warm blooded animals like humans. Blood •Blood makes up around 7% of the weight of a human body.
•Blood contains red blood cells, white blood cells and platelets.
•These blood cells float in a yellow liquid called blood plasma. Blood plasma is made up of 90% water and also contains various nutrients, electrolytes, gases, proteins, glucose and hormones. Plasma •plasma, a yellowish liquid that carries nutrients, hormones, and proteins throughout the body White Blood Cells White blood cells are part of the germ-fighting immune system. They are like little warriors floating around in your blood waiting to attack invaders, like viruses and bacteria. You have several types of white blood cells and each has its own special role in fighting off the different kinds of germs that make people sick. HEART The heart is an amazing organ. It continuously pumps oxygen and nutrient-rich blood throughout the body to sustain life. This fist-sized powerhouse beats (expands and contracts) 100,000 times per day, pumping five or six quarts of blood each minute, or about 2,000 gallons per day. Veins . If you've ever seen a road map, you probably saw many roads going here, there, and everywhere. Your body has a highway system all its own that sends blood to and from your body parts. It's called the circulatory system, and the roads are arteries and veins. Arteries, which usually look red, carry blood away from the heart. Veins, which usually look blue, return blood to the heart. RED BLOOD CEllS Red blood cells have the important job of carrying oxygen. These cells, which float in your blood, begin their journey in the lungs, where they pick up oxygen from the air you breathe. Then they travel to the heart, which pumps out the blood, delivering oxygen to all parts of your body. THE END THANKYOU FOR WATCHING What did you learn ?