1. Chapter 17, Section 3 Blood and Lymph Thursday, March 18, 2010 Pages 549 -- 554

2. Objectives Learn the four components of blood. Understand what determines the type of blood that a person can receive in transfusion.

3. Vocabulary Words Plasma Red Blood Cells Hemoglobin White Blood Cells Platelets Fibrin Blood transfusion Lymphatic system Lymph Lymph nodes

4. Components of Blood There are four components of blood. –Plasma –Red blood cells –White blood cells –Platelets

5. Red Blood Cells Red blood cells (RBC) carry oxygen from the lungs to the body. Made up of mostly hemoglobin. –Hemoglobin is an iron- containing protein that binds chemically to oxygen molecules. RBCs are produced in the bone marrow. RBCs have no nuclei.

6. Plasma Plasma is the liquid part of blood. Plasma is mostly water. 10% is dissolved materials such as food molecules, vitamins, minerals, waste products, and plasma proteins.

7. White Blood Cells White blood cells (WBCs) are made in the bone marrow. They are bigger than RBCs. They have a nuclei. Their job is to alert the body when disease-causing organisms invade. They produce chemicals to fight invaders or surround and kill the disease-causing organisms. This is a picture of WBCs attacking bacteria.

8. Platelets Platelets are cell fragments that help form blood clots. They collect and stick to any site where a blood vessel is cut. Chemicals are released that cause production of fibrin. –Fibrin is a chemical that weaves a net of fibers across a wound that traps blood cells that form a clot.

9. Blood Transfusion Blood transfusion is the tranference of blood from one person to another. The marker molecules on your RBCs determine your blood type and the type of blood you can safely receive in a transfusion.

10. Blood Types There are four types of blood. –Type A –Type B –Type AB –Type O Each type has different marker molecules.

11. Blood Type A Blood type A has an A marker. Blood type A can receive transfusions of type A or O because they do not have a B marker.

12. Blood Type B Blood type B has a B marker. People with blood type B can receive transfusions of blood type B or O because they do not have an A marker.

13. Blood Type O People with type O blood have both anti-A and anti-B clumping proteins. Blood type O can only receive type O blood. Nick-named the Universal Giver –Anyone can receive type O blood

14. Blood Type AB People with type AB blood have no clumping proteins. They can receive all blood types. Nick-named the Universal Recipient.

15. The Lymphatic System The lymphatic System is a network of vessels that returns the fluid to the bloodstream. Fluid that enters the lymphatic system is called lymph. Lymph nodes are small knobs of tissue that filter the lymph as it passes through.

16. Homework Workbook 17.3 (3/22) Vocabulary quiz 17.3 (3/23)