Circulatory system Flashcards
Role of circulatory system
Nutrients from intestines to cells,
waste from the cells through the kidneys, oxygenated blood from the lungs,
carbon dioxide away from cell to lungs.
Regulate body temp, transport WBC to areas of infection or viruses.
4 chambers of the heart
Right atrium
Right ventricle
Left atrium
Left ventricle
blood flow goes in this order.
Blood flow order
Blood comes into the right atrium from the body, moves into the right ventricle and is pushed into the pulmonary arteries in the lungs. After picking up oxygen, the blood travels back to the heart through the pulmonary veins into the left atrium, to the left ventricle and out to the body’s tissues through the aorta.
oxygenated blood pathway
he oxygenated blood is brought back to the heart by the pulmonary veins which enter the left atrium. From the left atrium blood flows into the left ventricle. The left ventricle pumps the blood to the aorta which will distribute the oxygenated blood to all parts of the body.
arteries
Carry blood away from the heart (carries oxygen rich blood)
Thick walled, elastic vessel can withstand high pressure
Pulmonary arteries
Carry blood from right ventricle to right and left lungs
Capillaries
Small vessels that carry blood to body cells (oxygen released into body cells)
1 cell thick and high surface area, allows for easy diffusion
Veins
Carry blood back to the heart (deoxygenated blood)
Thinner walls for lower pressure and has valves so blood doesn’t flow back
Pulmonary veins
Carry blood from the lungs back to the left atrium
RBC red blood cells
carry oxygen from the lungs and deliver it throughout our body. Red blood cells also transport waste such as carbon dioxide back to our lungs to be exhaled
WBC white blood cells
immune system cells -they attack invaders such as bacteria and viruses
platelets
prevent and stop bleeding
plasma
Liquid portion of blood
takes nutrients, hormones, and proteins to the parts of the body that need it and removes waste from cells
Why are heart diagrams backwards?
When looking at the heart, remember the right side of the heart will appear on the page as being on the left. This is becausethe heart is labelled as if it were in your body and flipped around.
double-loop circulatory system
where blood leaves the heart, goes to the lungs where it becomes oxygenated and then returns to the heart before delivering the oxygenated blood to the rest of the body.
mitral regurgitation
mitral valve does not close fully.
Blood stays in the left atrium
the heart has to work harder to pump enough blood to the body. The extra effort causes the left lower heart chamber (ventricle) to get bigger. Untreated, the heart muscle becomes weak. This can cause heart failure
