The physical barrier of the skin and the mucus produced by the epithelial cells lining body cavities release histamines comprise the innate immune system protect the body from infection by pathogens activate the complement system facilitate the production of antibodies

9. wind power creates pollution. water air soil noise

Fill in the blank 1. digestion occurs in the small intestine through the action of enzymes. 2. urea, excess water, and other waste materials are eliminated in a water fluid called 3. can cause infections by injecting dna or rna into hosts. 4. the human immune system produces in response to a vaccine, which later can bind to and destroy a pathogen if it invades. 5. are structures that link bone to bone at a joint 6. in the heart, blood flows from the right atrium to the right ventricle, where it is pumped to the the words i can use are: lymphocytes gliding pivot gas urine absorption dermis fulcrum lungs chemical viruses capillary vertebrae esophagus tendons antibodies synapses ligaments kidneys pathogens

Select the word from the list that best fits the definition the temperature to which air must cool to be saturated