specialised cells - animals

• Erythrocytes / red blood cells:  transport oxygen in the blood, have a short life span, 10 million are destroyed every second, new ones are made from stem cells in bone marrow
• neutrophils = cells that attack and destroy invading microorganisms by phagocytes (type of white blood cell)

Neutrophils

• the cytoplasm contains small granuals
• some of these are lysosomes
• lysosomes contain enzymes for digesting bacteria
• others are glycogen stores

Erythrocytes

• very small allowing it to travel through tiny capilliaries and so get very close to cells in…