Human Body

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Unit 9
Human Body
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Human Body Unit Objectives

• Know cell organization.
• Know the functions of 8 human body systems.
• Know how to label organs in each system
• Know the functions of organs and the system they
  belong to.

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Human Body Systems

• Homeostasis Maintain a stable internal
  environment.
• Examples temperature, breathing and blood
  pressure

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Four types of tissues

• Tissue is made up of a group of similar cells
  that work together.
• Epithelial - covers and protects underlying
  tissue. Ex. skin
• Nervous sends electrical signals throughout
  the body. Found in the brain, nerves and sense
  organs.
• Muscle cells that contract and relax to
  produce movement.
• Connective joins, supports, protects,
  insulates, nourishes and cushions organs.

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Cell Organization

• Tissues are made up of a group of cells that work
  together.
• Organs are formed by two or more tissues working
  together.
• Organ systems are formed by two or more organs
  working together.

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Organ Systems
1. Skeletal System
A framework that supports and protects body parts.
2. Muscular System
Allows for movement of body parts.
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Organ Systems
3. Circulatory System
Transports materials throughout the body in the
blood.
4. Respiratory System
Exchanges gases in the lungs.
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Organ Systems
5. Digestive System
Breaks down food into nutrients for the body.
6. Excretory System
Removes wastes from the body.
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Organ Systems
7. Nervous System
Controls activities using electrical signals.
8. Endocrine System
Regulates body functions using chemical signals.
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Skeletal
Nervous
Sensory
Endocrine
Muscular
Digestive
Respiratory
Circulatory
Urinary
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April 21st

• Write down homework
• Page 9-5 in packet
• Study flashcards for 8 body systems.
• Quiz Thursday!
• Get out your homework to be checked.
• Think about what you know about the skeletal and
  muscular systems.

Quiz Thursday on 8 Body Systems!
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Digestive System
Respiratory System
Circulatory System
Excretory System
Skeletal System
Muscular System
Nervous System
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Integumentary System

• What does the Integumentary system do?
• Protects you from the outside world
• Helps maintain a healthy internal environment.
• What makes up the Integumentary System?
• Skin
• Hair
• Nails

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Integumentary System

• What are the four important things that skin
  does?
• Protects keeps moisture in and keeps foreign
  particles out
• Allows you to feel surroundings with nerves
• Controls body temperature by producing sweat in
  sweat glands.
• Removes wastes in sweat.

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Integumentary System

• What determines your skin color?
• The amount of melanin, a chemical, in your skin
• What are the two main layers of skin?
• Epidermis
• Dermis
• What does the epidermis do?
• Thin layer, on top
• Made up of epithelial tissue
• Many layers, thin, mostly dead cells
• Keratin makes skin tough

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Integumentary System

• What does the dermis do?
• Thick layer, deeper down, underneath epidermis
• Connective tissue and collagen that provide
  strength and flexibility
• Nerves, blood vessels, sweat and oil glands,
  muscle fibers hair follicles are found here.
• How does hair grow?
• New cells grow at the hair follicle and push out
  old dead cells

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Integumentary System

• What does hair do?
• Protects from UV light and foreign particles
• Controls body temperature
• What do nails do?
• Protects tips of fingers and toes to allow for
  feeling (sense of touch).