Body Organization Ch 22.1 7th
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Chapter 22 Section 1 Body Organization
description
Notes for 7th grade obtained from Holt Science and Technology: Life Science. Austin: Holt Rinehart & Winston, 2007. Print.
Transcript of Body Organization Ch 22.1 7th
Chapter 22 Section 1
Body Organization
Objectives:
Describe how tissues, organs, and organ systems are related
List 11 organ systems
Identify how organ systems work together to maintain homeostasis
Homeostasis:Definition: the maintenance of a stable
internal environment in the body
http://www.southtexascollege.edu/nilsson/4_GB_Lecture_figs_f/4_GB_16_Homeostasis_Fig_f/Homeostasis_TempControl.GIF
Cells, Tissues, and Organs:
Maintaining homeostasis is not a simple task
Internal environment is always changing
Cells need nutrients and oxygen to survive, wastes need to be removed
If homeostasis is disrupted, cells may die
Cells form Tissues:Each cell in your body has a role in maintaining
homeostasis
Your cells are organized into groups
Tissue: a group of similar cells working together
Your body has 4 main kinds of tissues:EpithelialNervousMuscleConnective
4 Types of Tissue:Epithelial Tissue: covers and protects
underlying tissue; ex: skinNervous Tissue: sends electrical signals
through the body; found in brain, nerves, sense organs
Muscle Tissue: made of cells that contract and relax to produce movement
Connective Tissue: joints, supports, protects, insulates, nourishes, and cushions organs
Tissues:
http://graphics8.nytimes.com/images/2007/08/01/health/adam/8682.jpg
Tissues form Organs:
Two or more tissues working together form organs
Organ: a collection of tissues that carry out a specialized function of the body
Ex: Stomach, heart, lungs, kidneys
Organs Form Systems:
Organs that work together make up an organ system
Your body has 11 major organ systems
How many can you list??
Working Together: Organ Systems11 Major Organ Systems:
Integumentary (skin)Muscular SkeletalCardiovascularRespiratoryUrinaryReproductiveNervousDigestiveLymphaticEndocrine
Highlighting systems:
Cardiovascular system:Heart, blood vessels,
blood
Respiratory system:lungs
Both systems work together
Quick Quiz:
True or False?Epithelial tissue sends electrical signals
throughout the body
Blood is a type of connective tissue
Homeostasis is the maintenance of a stable internal environment
