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Science 7th Part 2
Chapter 3- Your Wonderful Body- A Beka Book- Science Order and Design- Malia N.
| Question | Answer |
|---|---|
| Excretory system | Excretes wastes from your body |
| Excrete | Remove |
| Urinary system | Removes liquid and soluble waste products from the body |
| What are the organs that form the urinary system? | Kidney, ureters, bladder, and uthera |
| Kidney | Bean-shaped organs that contain a compact system of very small tube. These tubes filter waste products and excess water from your blood and transfers them to the urters |
| Ureters | Connect the kidneys to the bladder |
| Bladder | Stores the liquid waste, called urine, until it is eliminated through the urethra |
| Urethra | The canal that discharges urine from the body |
| Lymphatic system | This system's function is to circulate certain body fluids and protect your body from disease |
| Tissue fluid | Surrounds every cell in your body and helps your cells stay clean and maintain the right water balance |
| Lymph | What tissue fluid is called after it cleans the cells |
| Lymph is transported only ___ ___. | One way. Lymph does not circulate as blood does. The lymph depends solely on your muscle contractions to push it from one location to another. |
| Lymph nodes | Enlarged bundles of lymphatic tissue that clean lymph of debris and microorganisms before sending the lymph back into the blood |
| Pathogens | Disease causing organisms |
| Tonsils and adenois | Accumulation of lymphatic tissue that prevent pathogens from entering your body through your throat |
| Spleen | The largest lymphatic organ |
| The main jobs of the spleen are to ______ ___ and _______ of dead cells and microbes in the blood and serve as a ______ ____ for blood. | Filter out, dispose, storage tank |
| Immune system | The system of defense that fights invading microorganisms |
| White blood cells | Attack invaders |
| Neutrophils | Execute the bodies initial attack |
| Macrophages | "big eaters" These move in after the neutrophils to combat the missed enemies and to clean up after the battle |
| Phagocytes | "eater cells" Phagocytes contribute the most in battles against pathogens |
| Antibodies | Produced by B cells which are activated by helper T cells |
Created by:
nelsonclan
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