Body Systems Skeletal System Materials needed - Writing utensil, g uided notes, teacher script and assessment Intro: 1.Let students know we will be talking about the skeletal system. We are going to focus on the functions of the skeletal system. 2.While handing the guided notes, have students think why bones are an important part of the body and ask them for their answers. Activity: 1.On the projector, display slide 6 from this PP presentation (skeletal system facts). Call on various students to read through the facts to the rest of the class. 2.Next show, slide 7 (purpose of skeletal system). Instruct students that they are to follow along with their guided notes filling in the blanks. I have set up an animation, so one letter area will be displayed at a time. 3.Let the students fill in one section at a time. After each section read from the teacher script. 4.There is a 5 point assessment if you choose or assess as needed.

Purpose of the Skeletal System (teacher script) A. The skeleton provides the framework for the body. Bones provide the basic shape and structure for the body. (What do you think we would look like if we didn’t have bones? Pretty silly right?) The bones are like the beams inside of a building, and all of our organs, muscles and skin are organized around the bones, just like the walls of a building. B. The skeleton protects organs in the body. Bones can cover and protect many of our major organs. They are like an armor that protects our insides. Can anyone think of any examples? 1. cranium: protects the brain 2. ribs/sternum: protects the lungs, heart and some digestive organs (have students feel just above their stomach along the outer edge. Those ridges are their ribs). 3. pelvis: protects and supports the digestive and reproductive organs 4. spinal column: protects the spine (have students bend over at their desks and feel along the middle of their back. Those bumps are their vertebrae). C. Blood Cell Production. Inside of the long bones in our bodies, there is a cavity that is filled with a substance called Bone Marrow. In this tissue, new blood cells are produced, and damaged blood cells are repaired. D. Movement. The bones are the levers that help the body move in different directions and in different ways. (Here is a question for you all: Do bones move by themselves when we walk, talk or move around? Or are they controlled by something else? What makes them move?) Muscles move bones by contracting, which pulls the bone, causing us to move around. The bones by themselves can’t move without the muscles that are connected to them. (Have student put their hand on one biceps. Have them move their arm up and down to feel the muscle contracting and relaxing as it moves.) E. Mineral Storage. (Can someone describe what a mineral is to the class?) It is a substance that the body needs to carry out all of our bodily functions like thinking, breathing and moving around. One of the minerals that the body needs is calcium. Calcium is a major part of bone, and this is where the body stores its calcium. It is very important to make sure you eat enough calcium each day because if you don’t get enough calcium, your body will take the calcium it needs from your bones. Can someone tell me why this could be bad? The less calcium the bone has, the weaker it will become.

Guided Notes (student copy) Purpose of the Skeletal System: A. The ________________provides the _______________for the body. B.The skeleton ___________ organs in the body. Bones can cover and protect many of our major organs. cranium: _______________________________________________ ribs/sternum: ___________________________________________ ______________________________________________________ pelvis: protects and supports the digestive and reproductive organs spinal column: __________________________________________ C.In ___________ bones, there is a cavity that is filled with a substance called ___________ _____________. In this tissue, new blood ___________are produced, and damaged blood cells are repaired. D.The bones are the __________that help the body move in different ____________and in different ways. ___________move bones by contracting, which ___________the bone, causing us to move around. E.A mineral is a _______________that the body needs to carry out all of our ___________functions like thinking, _____________and moving around. One of the minerals that the body needs is calcium. ___________is a major part of ____________, and this is where the body stores its calcium.

Name: ____________________________________ Assessment: The Skeletal System Directions: Circle the correct answer 1. What structure gives the body shape and support? a. Muscles b. Bones c. Intestines 2. What bones protect the spinal cord? a. Vertebrae/Spinal Column b. Ribs c. Cranium 3. Which mineral is stored in our bones? a. Zinc b. Iron c. Calcium 4. What tissues allow the body to move in different ways? a. Bones b. Skin c. Muscles 5. What is the tissue called that produces blood cells? a. Blood marrow b. Blood cell tissue c. Bone marrow

Skeletal System Facts You are born with approximately 350 bones. By the age of two you have 206. The largest bone is the hip bone. It’s made of six bones joined firmly together. The longest bone is the 'femur', in the thigh. It makes up almost one quarter of the body's total height. The smallest bone is the 'stirrup', deep in the ear. It is hardly larger than a grain of rice. The ears and end of the nose do not have bones inside them. Their inner supports are cartilage.

Purpose of the Skeletal System: A. The skeleton provides the framework for the body. B.The skeleton protects organs in the body. Bones can cover and protect many of our major organs. cranium: protects the brain ribs/sternum: protects the lungs, heart and some digestive organs pelvis: protects and supports the digestive and reproductive organs spinal column: protects the spine C.In long bones, there is a cavity that is filled with a substance called Bone Marrow. In this tissue, new blood cells are produced, and damaged blood cells are repaired. D.The bones are the levers that help the body move in different directions and in different ways. Muscles move bones by contracting, which pulls the bone, causing us to move around. E.A mineral is a substance that the body needs to carry out all of our bodily functions like thinking, breathing and moving around. One of the minerals that the body needs is calcium. Calcium is a major part of bone, and this is where the body stores its calcium.