Which fluid lubricates joints and reduces friction between bones during movement?

Which fluid cushions and protects the brain and spinal cord from mechanical shock?

Which fluid in the lymphatic system helps transport white blood cells and remove waste from tissues?

Which protective membranes cover and protect the brain and spinal cord?

Which white blood cell type is primarily responsible for producing antibodies against pathogens?

Which membrane surrounds the heart and protects it within the chest cavity?

Which white blood cell type is the most abundant and primarily fights bacterial infections?

Which membrane surrounds the lungs and reduces friction during breathing movements?

Which vitamin is essential for proper blood clotting and is often associated with green leafy vegetables?

Which gas exchange membrane structure in the lungs maximizes surface area for efficient breathing?

Which vitamin acts as an antioxidant protecting cells from damage and is found in nuts and seeds?