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Gr 7 Science Ch 3

Gr 7 Science Ch 3.2 (Urinary & Lymphatic Systems)

TermDefinition
excretory system body system that excretes wastes from the body
urinary system portion of the excretory system that removes liquid and soluble waste products from the body
kidneys bean-shaped organ that filters waste products and excess water from the blood
ureters either of the tubes that connect the kidneys to the bladder
bladder organ where urine is stored
urethra canal that discharges urine from the body
lymphatic system portion of the immune system that circulates tissue fluid
tissue fluid liquid that surrounds every cell in the body
lymph tissue fluid that has been forced into lymph vessels
lymph nodes enlarged bundles of lymphatic tissue that cleans lymph of debris and microorganisms
Peyer's patches groups of lymph nodes in the ileum of the small intestine which continuously clean and protect your digestive system so that it can work efficiently
spleen largest lymphatic organ; filters dead cells and microbes in the blood; serves as a storage tank for blood
immune system body system that fights pathogens
lysozyme antibacterial enzyme contained in tears and perspirations
skin prevents many harmful microorganisms from entering your body
mucous membranes line body passageways that open to the outside and use mucus to trap invaders
stomach's hydrochloric acid destroys most harmful bacteria that enter your digestive system with your food
white blood cells phagocytes
lymphocytes groups of white blood cells that includes B cells, helper T cells, and killer T cells
antibodies substances produced by the body to inactivate pathogens so they cannot do any damage before they are destroyed
immunity ability of the body to resist invasion by a pathogen
thymus organ that is located behind the breastbone and between the lungs and plays an important role in the development of lymphocytes
adenoids accumulation of lymphatic tissue that prevents pathogens from entering the body through the throat
tonsil accumulation of lymphatic tissue in the throat
acquired immunity resistance to disease caused by being exposed to a pathogen, receiving a vaccine, or receiving an injection of antibodies
innate immunity the body's natural resistance to disease in general or to specific diseases (without having been exposed to the pathogen or a vaccine)
Created by: mbrennan262