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Chapter 3: Human Body Systems Study Guide Lesson 1: What is the circulatory system? The ___________________________________ moves material around the body. It can be called the body’s ______________________________________________. Parts of the circulatory system are o ________________ o ________________ o ________________ called _______________ The circulatory system carries ___________________ and _________________ to each cell and takes away cells’ __________________. The blood’s ____________________ carries food from the digestive system to your cells. Cells also get __________________ from plasma. Red blood cells carry _______________________ to the body’s cells. White blood cells protect your body against ______________________ and other harmful things. When the body needs to fight _________________________ , it makes _____________________white blood cells. Blood is made up of _____________________________ cells, _________________________, ______________________________, and ________________________________. __________________________ are blood vessels that carry blood ________________ from your heart to other parts of your body. The smallest kind of blood vessel is called a _________________________. __________________ are blood vessels that take blood from cells ___________________ to the heart. The human heart has ____________ chambers. The upper parts are the _____________________ and the lower parts are the ___________________________. Lesson 2: What is the respiratory system? The respiratory system carries _________________ between the outside air and your ______________. The respiratory system includes these parts; o _____________________ - a tube that carries air from the __________________to the lungs o _____________________ - smaller tubes from those that branch out from the trachea o _____________________ - a muscle in the bottom of the chest area that contracts with breathing o _____________________ - where oxygen enters the blood & carbon dioxide leaves the blood The air sacs walls are covered with a web of tiny blood vessels called _________________________. In humans, the respiratory and circulatory systems work together to get ____________________ to the _______________________. Holding your breath causes __________________________________ to build up in your blood. Your _________________ sends a message to the diaphragm and __________________________________ telling them to breathe. Lesson 3: What are the digestive and urinary systems? Food passes through many organs as you ____________________. These organs help the _________________________________ do its job. ___________________________ is the first step of digestion by making it small enough to swallow. The __________________________ pushes food to the ___________________________ by squeezing its rings of muscles in a pattern. At the bottom of your esophagus, under your lower left ribs is your _________________________. Your ___________________________ and _______________________________ are organs that send ____________________________________ to your small intestine to help digest food. Villi give the ___________________________________________ more surface area to absorb food. The ____________________________________________ works in your body to get rid of wastes that are in the blood. _______________________________ are a pair of organs in the urinary system that remove wastes from your blood. The kidneys help keep right amount of ______________________, ________________________, calcium, nutrients and other ______________________________ into your blood that your body needs. A _____________________ carries ________________________ away from the kidneys to the ________________________________________________ where it is _________________________ until it leaves the body.