unit 4 - t cytoxic, help and lymphatic system

What is the main function of T cytotoxic cells?

Killing and destroying other cells.

What types of cells or organisms do T cytotoxic cells target?

Virus-infected cells, cancer cells, parasites, intracellular bacteria, and foreign cells from transfusions

What happens to T helper cells once they are primed by APC cells?

They activate more T cells and B cells and activate macrophages.

What is necessary for an immune response?

helper t cells

What is the lymphatic system?

vessel system closely tied to the cardiovascular system

How does blood pressure from the cardiovascular system affect the lymphatic system?

It moves water into the lymphatic system.

Where does water from the lymphatic vessels return to?

cardiovascular system.

What are the three main parts of the lymphatic system?

Lymphatics, lymph, and lymph nodes.

What are the lymphatics?

A network of lymphatic vessels.

What is lymph?

Fluid in the lymphatic system, mostly composed of water and lymphocytes.

Approximately how many lymph nodes are found throughout the body?

~600-700 nodes

What is the main job of lymph nodes?

filter lymph

Which immune cells are found inside lymph nodes to attack foreign pathogens?

Macrophages and B cells.

Where are many helper T cells found in lymph nodes?

At the edge of the medulla and cortex.