bones, muscles, and skin - body organization and homeostasis organs and organ systems each organ in...
TRANSCRIPT
Bones, Muscles, and Skin - Body Organization and Homeostasis
Organs and Organ Systems
Each organ in your body is part of an organ system, which is a group of organs that work together to perform a major function.
Bones, Muscles, and Skin - The Skeletal System
What the Skeletal System Does
Your skeleton has five major functions. It provides shape and support, enables you to move, protects your organs, produces blood cells, and stores minerals and other materials until your body needs them.
Bones, Muscles, and Skin - The Skeletal System
Joints of the Skeleton
A joint is a place in the body where two bones come together. Joints allow bones to move in different ways.
Bones, Muscles, and Skin - The Skeletal System
Bones—Strong and Living
Bones are complex living structures that undergo growth and development.
Bones, Muscles, and Skin
Question Answer
Asking QuestionsBefore you read, preview the red headings. In a graphic organizer like the one below, ask a what or how question for each heading. As you read, write answers to your questions.
What does the skeleton do? The skeleton provides shape and support, helps you to move, protects organs, produces blood cells, and stores minerals and other materials.
How do joints move? Joints can move forward or backward, in a circle, in a rotating motion, and in a gliding motion.
How strong are bones? Bones can absorb more force without breaking than granite or concrete.
What can I do to care for my bones? Eat a well balanced diet and get plenty of exercise.
- The Skeletal System
Bones, Muscles, and Skin - The Muscular System
Muscles at Work
Because muscle cells can only contract, not extend, skeletal muscles must work in pairs. While one muscle contracts, the other muscle in the pair relaxes to its original length.
Bones, Muscles, and Skin
When you preview, you look ahead at the material to be read. Preview Figure 15. Then, in a graphic organizer like the one below, write three questions that you have about the diagram. As you read, answer your questions.
Previewing Visuals
Types of Muscle
Q. How does skeletal muscle help my body move?
A. Skeletal muscles are attached to the ends of bones and provide the force to move them.
Q. Where is smooth muscle found?
A. The inside of many internal organs
Q. Why is cardiac muscle considered a special type?
A. It is found only in the heart; it is like smooth muscle because it is involuntary and like skeletal muscle because it is striated.
- The Muscular System
Bones, Muscles, and Skin
Skeletal Muscles
Click the Video button to watch a movieabout skeletal muscles.
- The Muscular System
Bones, Muscles, and Skin
More on Muscle Types
Click the PHSchool.com button for an activityabout muscle types.
- The Muscular System
Bones, Muscles, and Skin - The Skin
The Epidermis
The skin is organized into two main layers: the epidermis and the dermis.
Bones, Muscles, and Skin
Identifying Main IdeasAs you read the section titled “The Body’s Tough Covering,” write the main idea—the biggest or most important idea—in a graphic organizer like the one below. Then write five supporting details. The supporting details give examples of the main idea.
The skin has several important functions.
The skin forms a barrier against disease-causing microorganisms and loss of fluids.
The skin helps the body maintain a steady temperature.
The skin helps to eliminate wastes through perspiration.
The skin contains nerves that gather information about the environment.
Skin cells produce vitamin D that helps your body absorb calcium.
Detail Detail Detail Detail Detail
- The Skin
Main Idea
Bones, Muscles, and Skin
Graphic Organizer
Muscles
Voluntary muscles
can be
include
Involuntary muscles
include
Smooth muscles
Cardiac muscles
Skeletal muscles