Unit 2: Cells and Systems Topic 3: The Circulatory System
The Circulatory System The main purpose of the Circulatory System is to: Transport oxygen and carbon dioxide Transport and deliver nutrients Remove waste products The Circulatory System is composed of: The Heart Veins Arteries Capillaries Do you even lift Bro?
The Heart Let’s get to the heart of the matter…….get it? ;) The heart pumps blood through your body It is actually two pumps in one, talk about bang for your buck. And each pump has Two chambers! 2x2=4, which means the heart has four chambers!
The Heart
The Heart
The Heart The right side of the heart pumps blood to the lungs and consists of the Right Atrium and the Right Ventricle Right Atrium pumps blood from the body into the Right Ventricle Right Ventricles pump blood to the lung The goal here is to take blood low in oxygen, high in carbon dioxide and to bring it to the lungs, where it exchanges carbon dioxide for oxygen The left side of the heart pumps blood to the body and consists of the Left Atrium and the Left Ventricle Left Atrium pumps blood from the lungs into the Left Ventricle Left Ventricle pumps blood into the body
The Heart Basically: Right side of the heart is in charge of the lungs Left side of the heart is in charge of the body The heart is so strong, it pumps blood through 100, 000 Km of blood vessels That is like running from one side of Canada to the other and back five times If three people decided to untangle all their blood vessels and carefully stich them together, you could reach the moon! The heart Works so hard, if you cut open before it pumps, it would shoot the blood up nearly 9 meters! That’s pretty hardcore
Live Action Heart Heart Beating https://www.youtube.com/watch?v=vZNa_I4xBnk 1:20
Arteries, Veins and Capillaries Arteries (think red)carry blood (oxygenated) away from your heart and lungs to the body Veins (think blue) carry blood (deoxygenated) towards the heart and lungs, from the body
Arteries, Veins and Capillaries Blood vessels are made up of 3 kinds of tissues Connective tissue (outside) Muscle (middle) Epithelial (inside) What might be the purpose of the thick muscular layer for Arteries?
Arteries, Veins and Capillaries Blood vessels are made up of 3 kinds of tissues Connective tissue (outside) Muscle (middle) Epithelial (inside) What might be the purpose of the thick muscular layer for Arteries? Expands and contracts to push your blood through your body AKA your pulse
Arteries, Veins and Capillaries Lets test it out What is your pulse? Your heart rate is the number of times your heart beats in a minute.
Arteries, Veins and Capillaries How do Veins function? Carry deoxygenated blood back to your lungs Have valves to stop blood flowing backwards
Arteries, Veins and Capillaries When the valves don’t function properly…..Varicose Veins
Arteries, Veins and Capillaries Capillaries allow oxygen to exit the blood to important tissues and absorb carbon dioxide to take back to the lungs. This is done through Diffusion.
Arteries, Veins and Capillaries Capillaries are just one cell thick!
Blood Blood is the second largest connective tissue in the body! (Bones are the largest) Blood consists of: Red blood cells (carry oxygen and carbon dioxide) White blood cells (fight off infection) Platelets (tiny cells that clot your blood to stop bleeding) Plasma ( is 55% of total blood basically a liquid that suspends the blood and also carries carbon dioxide)
Blood If you like Spiderman as much as I do, remember this guy? The Vampire Morpheus required Plasma, because blood wasn’t okay to say on a kids show haha
Blood Ever wonder why tattoos are permanent? White blood cells try to eat the ink molecules but they are too big and just sit there in your skin!
Blood Plasma Platelets Red White