Body Systems Introduction and Circulatory System.
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Transcript of Body Systems Introduction and Circulatory System.
Body Systems Introduction and Circulatory System
Biological Structures
Biological Structure
parts within a living organism or cell
Examples:
Kidney, lung, mitochondria, chloroplast
It that makes up a living thing, or a living
thing itself
Order of Biological Structures
From Smallest to Largest
Organelle Cell Tissue Organ Organ System Organism
Order of Biological Structures
Draw a picture that helps you remember the order of Biological Structures
Order of Biological Structures Organism- a living unit/species that is completely
functional with all necessary parts
System-a group of related body parts that work
together to form a specific function
Organ- part of an organism that has a specific vital
function (ex: heart, lungs, etc.)
Tissue- specialized cells and their products forming a
certain material in the body
Cells- the smallest unit of life
Benefits of Specialized Cells
Specialized Cells-multicellular organisms have cells that can become specialized for a specific task
Example: Kidney Cells, Heart Cells, Lung Cells This allows for specialized body parts: kidneys,
heart, and lungs. Organisms with specialized cells live longer. Why do you think this is?
Benefits of having Specialized Cells
Benefits:
1. Organism has specific and unique parts
2. Species can be both male and female
3. Organism can have specific body
systems (Excretory, Digestive, etc.)
4. They tend to live longer because the cells
can focus on one task
12 Body Systems Integumentary Skeletal Lymphatic Immune Reproductive Endocrine
Circulatory Digestive Excretory Respiratory Nervous Muscular
Circulatory System Organs/Parts: Heart Blood vessels: arteries and veinso Function: Circulates blood throughout the body
Circulatory System Continued Heart- A hollow,
muscular organ that pumps blood throughout the circulatory system
http://www.youtube.com/watch?v=oE8tGkP5_tc
Circulatory System Continued Arteries:
carries blood Away from heart Oxygenated blood Carried under great pressure
Circulatory System Continued Veins: Carries de-oxygenated blood (CO2)
towards the heart Not under a lot of pressure; has valves
to work against gravity
Circulatory System Continued
Why is the artery so much thicker than the vein?
Key Ideas