Chapter 21, Problem 2WWTS

Summary Introduction

Introduction:

The human system needs to protect itself from pathogenic microorganism or foreign invaders that can cause serious illness to death. In order to fight against the pathogens, the human system has a well-organized system called the immune system or lymphatic system that consists of a group of cells that inhabit in all organs of our body. The components of the lymphatic system are lymphatic vessels, lymphatic organs, lymph, and lymphatic tissue that are composed of macrophages and lymphocytes.