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30.1 Organization of the Human Body
- Organization of the human body- Homeostasis- Feedback Inhibition
Organization of the Human body
• Cells (smallest)• Tissues• Organs• Organ system
(largest)
Cells
• The basic unit of structure of the human body.
• Tend to be specialized in multi-cellular organisms.
Tissues
•A Tissue is a group of cells that are working together.
Organs
• Organs: a group of tissues that work together to perform a single function or a group of functions.
Organ Systems
•Organ Systems: A group of organs that perform closely related functions.
Tissues
•Epithelial•Connective•Nervous•Muscle
Epithelial Tissue• Lines the inside and
outside surfaces of different organs.
• Function(fxn): Protection, absorption, and excretion
• Example: Skin, stomach lining.
Connective Tissue
• Provides support for the body and its parts• Bind epithelial tissue to structures,
support, and transport. • Examples: collagen,
Nervous Tissue• Receives and transmits nerve impulses
(signals) • Example: Brain, spinal column, and
nerves.
Muscle Tissue
• Voluntary and Involuntary movements
• Skeletal, cardiac, and smooth muscles.
Name the organ without all types of tissue.
Organ Systems that work Together
HomeostasisHomeostasis• Homeostasis:• The relatively
constant internal physical and chemical conditions that organisms maintain despite changes in their environment
Examples of Homeostasis
•Blood pressure
•Body Temperature
•Blood pH
Feedback Inhibition
• The way the body maintains homeostasis.
• The body produces a response to oppose the original stimulus
• Heater Example: the heater shuts off after the temp reaches a certain level.