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