Answer:The immune system is a network of cells, tissues and organs that work together to attack pathogens that try to invade your body. Bacteria, parasites and fungi that may cause infection meet a system of immune soldiers, including T-lymphocytes, macrophages and neutrophils.
Explanation:
Answer: B. cold heavy cream
Explanation: I'm a Penn Foster student to and these tests are ridiculous so and i took the test already and b is correct.
Answer: True
Explanation:
The disease called as the Osteogenesis imperfecta is the genetic disorder which causes imperfect formation of bones. This occurs due to abnormalities in the molecule of collagen which makes the matrix weak and this causes multiple fractures of the bone even before birth in severe cases. In milder cases the bones break with mild trauma.
