Body Systems

Journey Through Your Body Circulatory- distributes blood through your body Watch It!Watch It! – Heart, Veins and Arteries, Lungs Respiratory- oxygen in & into your blood; carbon dioxide out Watch this!Watch this! – Lungs, alveoli (air sacs/pockets), trachea (windpipe), diaphragm Skeletal- movement, protection, structure Check it Out!Check it Out! – Bones & joints Muscular- movement Look at It!Look at It! – Muscles Nervous- signals to brain, tell body what to do; senses Wow!Wow! – Skin, eyes, ears, nose, mouth, brain, spinal cord Digestive- breaks down food and releases energy Ohhh AhhhOhhh Ahhh – Mouth, esophagus, stomach, liver, intestines Excretory- gets rid of waste Look at it!Look at it! – Bladder, kidneys

Digestive breaks down food releases energy from that food Starts in the mouth – Teeth grind the food into smaller bits – Saliva starts to break down the food – Goes through esophagus to the stomach – Stomach gets nutrients out of food- uses stomach acid – The liver adds some chemicals like bile to help digest the food – Goes into the small intestine to get broken down more – Goes into the large intestine -- broken down more & have water/waste removed – After that, the excretory system takes over to get rid of it! – Ohhh AhhhOhhh Ahhh

Nervous Your senses take something in: see, hear, feel, taste, smell Your nerve cells (nerves) carry the message – Up your spinal cord – into your brain Your brain figures out what it means and tells your body what to do Your body listens to the brain and acts Wow!

Circulatory Distributes blood through your body Heart- pumps blood to lungs for oxygen and then to body Veins (TO) and Arteries (AWAY) Lungs- puts oxygen in blood and sends to heart Red blood cells: absorb oxygen and deliver it to body White blood cells: help fight infection (immune system) Platelets: helps blood clot Watch It!

Respiratory You inhale (breathe in) oxygen- lungs + diaphragm It goes to your lungs Tiny air pockets in the lungs called alveoli Blood that needs oxygen comes from the heart – BLUE Lungs put oxygen in blood and send it back – RED You exhale (breathe out) the carbon dioxide lungs take from the BLUE blood Watch this!

Excretory Waste comes from digestion Kidneys filter your waste to make sure there’s nothing else in there your body can use-- only the bad stuff goes Bladder holds it until you can get rid of it Look at it!

Muscular & Skeletal Skeletal- movement, protection, structure Check it Out! Check it Out! – Bones & joints Muscular- movement Look at It! Look at It! – Muscles How are they alike? How are they different?

Immune Fights infections Attack/destroy bacteria and viruses that enter your body – White blood cells