1. Body Organization
and Structure

2. Objectives Identify the major tissues found in the body
Compare an organ with an organ system
Describe a major function of each organ system.

3. How does a person stay alive even though the environment around him or her is so cold?
The answer:
Your body did not allow its internal
conditions to change enough to stop the cells from working properly.
The maintenance of a stable internal environment is called homeostasis

4. Homeostasis is not an easy task.
Your body must perform many different “jobs” to maintain homeostasis
Cells are organized into different “teams” to perform these jobs.
Each cell in your body has a specific job in maintaining homeostasis.

5. A group of similar cells working together forms a tissue.
Your body contains four main types of tissue
Epithelial tissue
Connective tissue
Muscle tissue
Nervous tissue

6. Epithelial tissue
Covers and protects underlying issue.
When you look at the surface of your skin, you see epithelial tissue.
The cells stick tightly and form a continuous sheet.

7. Nervous tissue Sends electrical signals through the body
It is found in the brain, nerves, and sense organs

8. Is made of cells that can contract and relax to produce movement.
Muscle tissue
Is made of cells that can contract and relax to produce movement.

9. Joins, supports, protects, insulates, nourishes, and cushions organs.
Connective tissue
Joins, supports, protects, insulates, nourishes, and cushions organs.
It also keeps organs from falling apart

10. Tissues Form Organs
Two or more tissues working together from an organ.
One type of tissue alone cannot do all the things that several types working together can do.

11. The stomach is an organ
The four types of tissue work together so that the stomach can carry out digestion
Nervous tissue in the stomach partly controls the production of acids that aid in the digestion of food. Nervous tissue signals when the stomach is full.
Epithelial tissue lines the stomach.
Layers of muscle tissue break up stomach contents
Blood and a connective tissue called collagen are found in the wall of the stomach.

12. Organs Form Systems
Your stomach does much to help you digest your food, but it doesn’t do it all.
It works together with other organs, such as the small intestine and large intestine, to digest your food.

13. 11 Organ Systems Integumentary system Muscular system Skeletal system
Skin, hair, and nails protect underlying tissue
Muscular system
Skeletal muscles move your bones
Skeletal system
Bones provide a frame to support and protect body parts
Cardiovascular system
Heart pumps blood through all your blood vessels

14. Reproductive system (male) Reproductive system (female)
Respiratory system
Lungs absorb oxygen and release carbon dioxide
Urinary system
Removes wastes from the blood and regulates the body’s fluids
Reproductive system (male)
Produces and delivers sperm
Reproductive system (female)
Produces eggs and nourishes and shelters the unborn baby

15. Nervous system Lymphatic system Digestive system Endocrine system
Receives and sends electrical messages throughout the body
Lymphatic system
Returns leaked fluids to blood vessels. It also helps you get rid of germs that can ham you
Digestive system
Breaks down the food you eat into nutrients that can be absorbed into your body.
Endocrine system
Glands regulate body functions by sending out chemical messengers. The ovaries, in females, and testes, in males, are part of this system

16. Make a chart that lists the major organ systems and their functions.
Things To Do
Make a chart that lists the major organ systems and their functions.