In the last class of Biology we worked with systems. We chose the Immune System. I worked with Tomi Zubizarreta and Mati Hartmann.

A system: In biology, it may refer to the biological or body systems. A biological system is a group of organs that work together to carry out a particular task.

The Immune system is made up of special cells, proteins, tissues, and organs which defend the body against infectious organisms and other invaders.

It attacks organisms and substances that invade body and cause diseases.

The Structure: The immune system’s five main structures are the tonsils and thymus, which make antibodies (Antibodies help stop intruders from harming the body. When an intruder enters the body, the immune system springs into action). The lymph nodes (acting as filters for foreign particles and cancer cells) and vessels. White blood cells also called Leukocytes are produced or stored in many locations in the body. This network of lymph nodes and vessels throughout the body carries lymph fluid, nutrients, and waste material between the body tissues and the bloodstream. The lymphatic system is an important part of the immune system.

Why are they called systems?

They are called systems because a system is a series of small things that together they carry out a particular task.