| A | B |
|---|
| What supplies food and oxygen to all cells of the body? | Blood |
| Where does blood transport the oxygen from? | The lungs |
| Where does blood transport the food from? | The digestive system |
| Where does the blood transport wastes to? | the lungs, excretory organs-kidney, liver, and skin |
| What are the wastes the blood transports? | Carbon dioxide, urea, ammonia, nitrogenous wastes |
| What is blood? | A liquid tissue |
| What is blood composed of? | Blood cells (45%) and a liquid called plasma (55%) |
| What are the 3 types of blood cells? | red cells, white cells, and platelets |
| What are red blood cells known as? | Erythrocytes |
| Where are erythrocytes manufactured? | the marrow of certain bones |
| What is marrow? | Soft connective tissue in the cavities of most bones. |
| What is hemoglobin? | A iron-rich substance found in red blood cells |
| What is the function of hemoglobin? | Carries oxygen from the lungs to the body cells and aids in taking carbon dioxide to the lungs and gives blood its red color |
| What do red blood cells look like? | Thick discs, concave on both sides |
| Why can't red blood cells multiply? | Mature red blood cells contain no nucleus |
| What are white blood cells named? | Leukocytes |
| How are white blood cells compared to red blood cells? | Somewhat larger and less numerous |
| For every white blood cell there are how many red blood cells? | 500-1,000 red blood cells |
| Where are white blood cells produced? | Most are produced in the bone marrow and 1/3 of them in the lymph nodes and spleen |
| What do white blood cells contain? | They contain a nucleus but are colorless |
| What is the body's main defense agains disease? | White blood cells |
| What happens when there is an infection? | The white blood cells gather, multiply, and engulf the bacteria |
| What are platelets? | The smallest and most numerous of the blood cells that aid in clotting |
| How do platelets clot? | The gather at the site of a broken blood vessel and they they disintegrate releasing a chemical factor that starts the clotting process |
| What is fibrin? | Threads of protein that froms a mesh at the site of a wound. Fibrin traps blood cells and the clot plugs up the hole. |
| What is plasma? | Plasma is a liquid in which the blood cells float is about 92% water |
| What does plasma contain? | Carbon dioxide, hormone,antibodies, wastes, enzymes, simple sugars, glycerol, amino acids, vitamins, and minerals. |
