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8/11/2019 Joy Organ Systems Pskg
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Section 35-1
Figure 35-2 Human Organ Systems Part I
Human Organ Systems
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Human Organ Systems
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Levels of Organization
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Chemical
– atoms combined to form
molecules
Cellular – cells are made of molecules
Tissue – consists of similar types ofcells
Organ – made up of different types oftissues
Organ system –
consists of differentorgans that work closely together
Organismal – made up of the organsystems
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Chemical level Atoms combine toform molecules
1
2
3
4
Cellular levelCells are made up of molecules
Tissue levelTissues consist ofsimilar types ofcells
5 Organ system levelOrgan systems consist of different
organs that work together closely
Organ levelOrgans are made up of
different types of tissues
6 Organismal levelThe human organism ismade up of many organsystems
Atoms
Molecules
Smooth muscle cell
Smoothmuscle
tissue
Connectivetissue
Smoothmuscletissue
Epithelialtissue
Bloodvessel(organ )
Heart
Bloodvessels
Cardiovascularsystem
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Organization of The Body
The eleven organ systems of the humanbody work together to maintain
homeostasis Homeostasis – process which organisms
maintain a relatively stable internal
environment
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Tissues
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Organs When a bunch of different types of tissues work
together, they form an organ.
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Organ Systems
Each organ in our body is part of an organsystem, a group of organs that worktogether to perform a major function.
Heart is part of your circulatory system,which carries oxygen and other materialsthroughout your body.
Besides the heart, blood vessels are organs thatwork in your circulatory system.
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ORGAN SYSTEMS
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Nervous System Integumentary System Skeletal System Muscular System Circulatory System
Section 35-1
Figure 35-2 Human Organ Systems Part I
Human Organ Systems
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Nervous System Integumentary System Skeletal System Muscular System Circulatory System
Section 35-1
Figure 35-2 Human Organ Systems Part I
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Nervous System Integumentary System Skeletal System Muscular System Circulatory System
Section 35-1
Figure 35-2 Human Organ Systems Part I
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Nervous System Integumentary System Skeletal System Muscular System Circulatory System
Section 35-1
Figure 35-2 Human Organ Systems Part I
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Nervous System Integumentary System Skeletal System Muscular System Circulatory System
Section 35-1
Figure 35-2 Human Organ Systems Part I
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Nervous System
Brain, Spinal cord, periperal nerves
Function: Coordinates the body’s response to
changes in its internal and externalenvironments
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Integumentary System
Skin, hair, nails sweat and oil glands
Function: Serves as a barrier against infection
and injury; helps to regulate bodytemperature; provides protection againstultraviolet radiation from the sun
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Respiratory System
Nose, pharynx, larynx, trachea, bronchi,bronchiales, lungs
Function: Provides oxygen needed for cellularrespiration and remove excess carbon dioxidefrom the body
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Digestive System
Mouth, pharynx, esophagus, stomach, smalland large intestine
Function: Converts foods into simplermolecules that can be used by the cells of thebody; absorbs food
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Excretory System
Skin, lungs, kidneys, ureters, urinary bladder,urethra
Function: Eliminates waste products ofmetabolism from the body; maintainshomeostasis
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Skeletal System
Bones, cartilage, ligaments, tendons
Function: Supports the body; protects
internal organs; allows movement; storesmineral reserves; provides a site for blood cellformation
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Muscular System
Skeletal muscle, smooth muscle, cardiacmuscle
Function: Works with skeletal system toproduce voluntary movement; helps tocirculate blood and move food through thedigestive system
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Circulatory System
Heart, Blood vessels, blood
Function: Brings oxygen, nutrients, and
hormones to cells; fights infection; regulatesbody temperature
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Endocrine System
Hypothalamus, pituitary, thyroid,parathyroids, adrenals, pancreas, ovaries(infemales), testes (in males)
Function: Controls growth, development,metabolism, and reproduction
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Reproductive System
Testes, epididymis, vas deferens, urethra, andpenis (in males); Ovaries, fallopian tubes,uterus, vagina (in females).
Produces reproductive cells; in females,nurtures and protects developing embryo
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Lymphatic System
White blood cells, thymus, spleen, lymphnodes, lymph vessels
Helps protect the body from disease; collectsfluid lost from blood vessels and returns thefluid to the circulatory system.
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Organ Systems Interrelationships
The integumentary system
protects the body from theexternal environment
Digestive and respiratorysystems, in contact with the
external environment, take innutrients and oxygen
Nutrients and oxygen aredistributed by the blood
Metabolic wastes areeliminated by the urinary andrespiratory systems
Figure 1.2
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• 4th Level: Organ Systems
• 2nd Level: Tissues
• 3rd Level: Organs
• 5th Level: Organisms
1st Level: Cells
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Organism
A single living organism. Example: Humans, Cows, Birds, Trees.
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Population
A group of organisms of one type staying inthe same area.
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Community
Different populations that live together.
Examples: Cows, snakes grass, hawk. They must all be LIVING Things
The community below includes the horses, cows,chickens & dogs
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Great Job