Life Science 2.3

The Lymphatic System

1. Describe the relationship between the lymphatic system and the cardiovascular system.

2. Identify six parts of the lymphatic system, and describe their functions.

Objectives:Objectives:

Lymphatic system Group of organs and

tissues that collect excess fluid and return it to your blood.

Vessels of the Lymphatic System

Lymph capillaries Smallest vessels of the lymphatic system.

Lymph The fluid and particles absorbed into lymph

capillaries.

Bone Marrow Soft tissue inside of bones. Where most red and white blood cells, including

lymphocytes, are produced.Lymph Nodes

Small, bean-shaped masses of tissue that remove pathogens and dead cells from the lymph.

Other Parts of the Lymphatic System

Thymus Gland that produces T cells that are ready to fight infection.

Spleen Largest lymphatic organ. Stores and produces lymphocytes.

Red pulp Removes damaged red blood cells

from circulatory system.White pulp

Produces white blood cells that fight infection.

Tonsils Lymphatic tissue in the nasal cavity and at the back

of the mouth on either side of the tongue. Help defend the body against infection.