1. Body Systems 8 th grade notes

2. Notes A system is a group of parts that work together as a unit to accomplish a common goal.

3. Cardiovascular System Delivers needed materials to the body Removes wastes from the body Interacts with all body systems Main Parts:Heart, arteries, veins, capillaries, blood

4. Digestive System Breaks down food into simpler substances that the body can absorb and used by the cells. The small intestine contains villi that absorb nutrients into the body. The muscular system helps the digestive system by you chewing, swallowing, and churning food in the stomach. Main Parts:mouth, esophagus, stomach, small Intestine, large intestine, liver, gallbladder, pancreas, rectum, and anus.

5. Muscular Muscles produce voluntary movement. Enables the whole body to move Uses the skeletal and nervous systems Main Parts: smooth, cardiac, and skeletal muscles

6. Respiratory System Delivers oxygen to your body Removes CO 2 from the body The cardiovascular system and the muscular system help this system to work Main Parts: pharynx, larynx, trachea, bronchi, lungs, and diaphragm

7. Skeletal System Supports and protects the body Works with the muscles to enable movement Main Parts: Bones, Joints, Cartilage

8. Endocrine System Produces chemicals that are called hormones that help control body processes. Main Parts: Glands Excretory System Removes wastes Helps to regulate the water in the body Main Parts: Kidneys, Bladder

9. Nervous System Obtains and processes information from the body’s internal and external environment. Directs most body functions. Main Parts: brain, spinal cord, peripheral nerves, and nerves

10. Cells What do you remember about cells from 6 th grade?

11. Activity 1 Sorting Systems-In this activity you will find a body system at your lab station. Organize each system by cells, tissue, organ, and organ system Name the system that you organized Have teacher check your team and if she okays it mix it up for the next team Move to the next station when the teacher gives permission

12. Activity 2 Objective: Systems work together to maintain homeostasis in the human body.

13. Discussion Describe a time when they were extremely cold or very warm. How did your body react? Begin Mini Lab