Body Systems Introduction and Circulatory System.

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Presentation transcript:

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 veins o Function: Circulates blood throughout the body

Circulatory System Continued  Heart- A hollow, muscular organ that pumps blood throughout the circulatory system  watch?v=oE8tGkP5_tc watch?v=oE8tGkP5_tc

Circulatory System Continued  Arteries: carries blood A way 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