37 2 Blood Lymphatic System Blood Made of

37 -2 Blood & Lymphatic System

Blood Made of: 1. 2. 3. 4. Plasma Red Blood Cells White Blood Cells Platelets

Plasma Platelets White blood cells Red blood cells Whole Blood Sample Placed in Centrifuge Blood Sample That Has Been Centrifuged

Blood Plasma • • • 55% of blood volume Yellow color Made of: – 91% Water – 9% protein, mineral salts, other • Functions: 1. Transport things through body 2. Regulate Osmotic Pressure and blood volume 3. Helps blood “clot, ” SCABS!

Red Blood Cells • AKA: “Erythrocytes” • Get Red color from Hemoglobin – ↑ O 2, Hemoglobin = Bright Red – ↓O 2, Hemoglobin = very Dark red – BLOOD NEVER TURNS BLUE! • Function: – Transport Oxygen

Erythrocytes

White Blood Cells • AKA: “Leukocytes” • Many kinds: – Macrophages – Lymphocytes • B-Cells • T-Cells • Function – Fight Infection

Leukocytes

Platelets • Small pieces of cells floating in blood • Function – Stop bleeding from broken blood vessels • Platelets become sticky • Form a clot = “SCAB”

Break in Capillary Wall Clumping of Platelets Clot Forms Blood vessels injured. Platelets clump at the site and release thromboplastin. Thromboplastin converts prothrombin into thrombin. . Thrombin converts fibrinogen into fibrin, which causes a clot. The clot prevents further loss of blood. .

Blood Type of Donor Blood Type of Recipient A B AB O Unsuccessful transfusion Successful transfusion

Lymphatic System • Structures: – Vessels – Nodes • Functions: 1. Collect fluid lost by blood 2. Returns fluid Circulatory System

Elephantiasis “Elephant Condition” 1. Worms are transmitted by mosquitoes to the blood 2. Build a population in the lymph nodes 3. Block fluid drainage from arms, legs, genitals, or breasts. • > 100 million people!

Review • What is the function of Red Blood Cells? • What is Blood plasma made of? • What do Platelets do? • Why do we have White Blood Cells? • What is the function of the Lymphatic System?

For you to do… 1. Think of a time that you got cut 2. Write a story about what happened – – At least 2 paragraphs How did you get cut? How long did you bleed? How long did it take to heal? 3. Write 1 paragraph about what was happening in your blood vessels as you were bleeding and the blood was clotting – At least 1 paragraph 4. Draw a picture – – Of your cut Of your blood vessels showing how the blood clot formed.