are tiny blood vessels that connect the arteries to veins. Here oxygen and nutrients are exchanged for carbon dioxide and other waste products.
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15
Parts of the excretory system...
kidneys, urethra, ureters and bladder.
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The respiratory system...
takes in oxygen and expels carbon dioxide. It's made up of the nostrils in the nose, the trachea, the two bronchi and the two lungs.
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The nose has two.......These have lots of little hairs and are narrow at the back. This is to stop foreign objects (dust), when a foreign object enters our nose, we blow or sneeze it out.
Nostrils
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15
The........are like big sacks.They fill up almost all your chest, they are squidgy , like sponges.
lungs
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The circulatory system...
takes blood to all parts of the body. It's made up of the heart and blood vessels.