Blood and Lymph

Composition of Blood Blood is the liquid that transports materials throughout the body within the blood vessels. Plasma, red blood cells, white blood cells, and platelets make up the blood.

Plasma Plasma is the straw colored, non- living part of blood. Plasma is 90% water. Plasma transports blood cells, end products of digestion, hormones, cellular excretions, and antibodies throughout the body.

Red Blood Cells Red Blood Cells are shaped like round plates that are indented in the center. Blood appears to be red because red blood cells contain the iron-rich pigment hemoglobin. –Hemoglobin carries oxygen from the lungs to the body cells.

White Blood Cells White blood cells fight infections and are part of the body’s defense or immune system. They are irregular in shape and have no color.

White Blood Cells White blood cells are larger than red blood cells and have a nucleus. There are fewer white cells than red cells unless they are fighting infection, when they increase in number.

Platelets Platelets are the third kind of cell in whole blood. They have no nucleus or color. As soon as a blood vessel has been cut, platelets begin to form a scab.

Blood Make Up

Blood vessel Brain Pop- Blood

Quick Check: 1. What are the 4 parts of blood? 2. What part fights infection? 3. What part carries oxygen and carbon dioxide? 4. What is the liquid part? 5. What is the part that forms scabs on your body? 6. What part is the most prevalent? 7. What is the least prevalent?

Blood Types A blood transfusion is the transference of blood from one person to another

Blood Types Are determined by a marker molecule on red blood cells This marker molecule determines your blood type and the type of blood you can safely receive in a transfusion

The Lymphatic System

As blood travels through the capillaries in the cardiovascular system, some of the fluid leaks out. It moves through the walls of capillaries and into surrounding tissues. This fluid carries materials that the cells in the tissues need. The lymphatic system is a network of veinlike vessels that returns the fluid to the bloodstream. The lymphatic system acts something like rain gutters after a rainstorm, carrying the excess fluid away. The Lymphatic System

Lymph comes from the portion of the blood plasma that diffuses out of the capillaries.

Lymph and Lymph Vessels The lymph system also helps protect the body against infection. The armpits, neck, and groin contain groups of tiny bean-shaped organs called lymph nodes.

Lymph and Lymph Vessels These structures filter out bacteria and viruses from lymph. Lymph tissue also produces a type of white blood cell that helps the body fight disease. aticsystem/