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B3 living & Growing2

OCR Gateway B3 Living an Growing

QuestionAnswer
The movement of a substance from a region of high to low concentration. Diffusion
Molecules enter and leave cells by diffusion through the Cell Membrane
Small digested food molecules are absorbed into the blood in the small intestine. Alveoli exchanging gases between the air and blood. Examples of Diffusion
Carbon dioxide and oxygen diffuse in and out of plants through the Leaves
Food and oxygen reach the foetus, and carbon dioxide and other wastes are removed, by diffusion through the Placenta
Transport oxygen Red Blood Cells
Defend against disease by engulfing disease organisms White Blood Cells
Helps blood clotting Platelets
Pumps blood to the lungs The right side of the heart
Pumps blood to the rest of the body The left side of the heart
Can build up in arteries and restrict or block blood flow and is linked to diet Cholesterol
Transport blood away from the heart Arteries
In the heart semilunar, tricuspid and bicuspid valves Prevent Backflow
In the heart left and right ventricles Pump Blood
Created by: ktravis