Answer:
The number of white blood cells in the blood can increase during an immune response. These cells travel through the circulatory system and the lymphatic system to an injured or infected area of the body. White blood cells leave the blood vessels and travel into the damaged tissue, where the immune response takes place.
Answer: The hamstrings are one of the muscles that flexes the knee joints
Explanation:
Answer:
The prairie ecosystem experienced a drought.
Explanation: