Answer:
White blood cells (WBCs) are a part of the immune system that helps fight infection and defend the body against other foreign materials. Different types of white blood cells are involved in recognizing intruders, killing harmful bacteria, and creating antibodies to protect your body against future exposure to some bacteria and viruses.
Explanation:
The answer is the last choice. "a behavioral change and is not related to the internal environment".
I hope this helps.
The major bronchi, pulmonary arteries, pulmonary veins, and nerves are the structures which enter and exit the lungs in this region.
Answer:
ethics
Explanation:
moral principles that govern a person's behavior or the conducting of an activity.
pls attach a photo or somthing
