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Circulatory System
Term | Definition |
---|---|
Artery | Have thick walls for the pressure of blood. carry oxygen rich blood away from the heart. |
Vein | Have thin walls. Carry oxygen poor blood toward the heart. |
Capillaries | Have thin walls. Is there where there needs to be a connection between a vein and artery |
Blood | Made of red blood cells, white blood cells, plasma, and platelets. |
Heart | Called cardiac muscle. pumps blood to cell to deliver oxygen. |
How the Heart works #1 | De-oxygenated blood enters through the Right Atrium. Goes through a valve into the Right Ventricle. |
How the Heart works #2 | right ventricle contracts forcing blood through a valve out of the Heart, towards the Lungs.Lungs will supply blood with oxygen. |
How the Heart works #3 | Oxygen rich blood enters Left Atrium then passes through a valve into the left ventricle. |
How the Heart works #4 | Left Ventricle contracts forcing Oxygen rich blood through another valve out of the heart to every cell,tissue, and organ in the body. Then the process starts over again. |
Valve | One way flow of blood makes the blood go faster. |
Plasma | Yellowish liquid. carries nutrients proteins, and hormones throughout the body. is 55% blood mostly water |
White Blood cells | Made in bone marrow. Fights infections. |
Red blood cells | Made in the bone marrow. has no organelles. Carries oxygen to every cell in the body. one drop of blood size of pinhead= up to 5mill |
platelets | Help the clotting process. Made in bone marrow. When blood vessel breaks, platelets in the area will seal the leak. Last 8 to 10 days. |
Independent Variable | The variable that is changed or manipulated. |
Dependent Variable | the variable that can be measured in some way |
Control Group | the group that is not changed in any way. Every thing will be compared to this group. |
Control Variable | the variable that isn't changed |