2.1 Body Systems

1
2.1 Body Systems

• A system is made of parts that work together as a
  whole.
• The Characteristics of Systems
• 1. A system is made of individual parts that work
  together as a whole.
• 2. A system is usually connected to one or more
  systems.
• 3. If one part of a system is missing or damaged,
  the system will not function well or may not
  function at all.

A stereo system has many parts that work together.
See pages 54 - 55
2
(No Transcript)
3
Systems of the Human Body

• Eleven systems of the human body

• Circulatory System
• Transports blood, nutrients, gases, and wastes
• Digestive System
• Breaks down food and absorbs the nutrients
• Respiratory System
• Exchanges gases in lungs and tissues
• Excretory System
• Removes liquid and gas wastes from the body
• Immune System
• Defends body against infections
• Endocrine System
• Manufactures and releases hormones

See pages 56 - 57
4
Systems of the Human Body

• More Systems

• Reproductive System
• Includes reproductive organs for producing
  offspring
• Integumentary System
• Creates a waterproof barrier around the body
• Skeletal System
• Supports, protects, and works with muscles to
  move parts of the body
• Muscular System
• Has muscles that work with the bones to move
  parts of the body
• Nervous System
• Detects changes in the environment and signals
  the body to carry out a response

See pages 56 - 57
5
Circulatory System
6
Digestive System
7
Respiratory System
8
Excretory System
9
Immune System
10
Endocrine System
11
Reproductive System
12
Integumentary System
13
Skeletal System
14
Muscular System
15
Nervous System
16
Organ Systems

• An organ system has one or more organs that
  perform specific body functions.
• For example your heart is part of the circulatory
  system.
• The four levels of organization within the human
  body are
• cell tissue organ
  organ system

See page 58
17
Organ Systems
18
Tissues The Foundation of Body Systems

• Tissue is a group of cells that have the same
  structure and function.
• Four types of body tissue
• Muscle tissue
• Assists in body movement
• Nerve tissue
• Transfers signals to and from brain
• Connective tissue
• Holds together and supports other tissue
• Epithelial tissue
• Covers the surface of organs and body

See pages 58 -59
19
Take the Section 2.1 Quiz