EXCRETORY & URINARY SYSTEMS - CLOZE Passage Directions: Use the word bank provided below to “close” the text and fill-in-the-blanks.
The human body is an incredible creation. It all starts with , which are microscopic units of life. Groups of cells form , such as epithelial and tissue. Groups of tissues form , and groups of organs form . Examples of organ systems include the respiratory system, , and excretory system. Let’s explore the excretory and urinary systems!
First, recall that the digestive system removes from the food we eat. But what happens to leftovers? What happens to the stuff in our food that our body doesn’t use or ? That’s where the excretory system comes in! The excretory system removes the waste from the body. Undigested food passes through the large intestines where is removed. are also in the large intestines that begin to feed on the waste and the waste. The remaining solid waste is pushed into the rectum (at the of the large intestines). Wastes are stored in the rectum for a period of time. Last, the waste is pushed out the when you use the restroom.
Now let’s turn to liquid waste. Recall that your cells create energy, but they also give off break down
and chemicals. These wastes are transferred back into the blood and organ systems by the urinary system. The main organ responsible for filtering wastes and from the blood is the kidney. You have kidneys in your lower back - they are shaped like and are about the size of your . As blood passes through the kidneys, urea and water are , as well as and other harmful chemicals. This liquid moves down through the ureters and is stored in the . When your bladder reaches a certain level (or is full), you feel the need to empty it. leaves the bladder through a tube called the when you go to the restroom.