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From smallest to largest, the body's levels of organization are: |
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Cell, tissue, organs & organ system. |
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What is the function of the nucleus? |
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Directs the cell's activities. |
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What does the nucleus contain & what is it? |
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DNA - information that determines the cells form & function. |
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What is the function of cells? |
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The basic unit of structure & function in living things. |
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A group of specialized cells that perform the same function. |
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What are the 4 types of tissues? |
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Definition
Muscle, nervous, connective & epithelial. |
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What is the job of muscle tissue? |
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Definition
Makes parts of your body move by contracting or shortening. |
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What does nervous tissue do? |
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Directs & controls the process. They carry electrical messages between the brain & other parts of the body. |
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What does connective tissue do? |
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Provides support for your body & connects all its parts. |
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What are examples of connective tissue? |
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What is epithelial tissue? |
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Tissue that covers the surfaces of your body inside & out. |
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A structure that is composed of different kinds of tissue & does a specific job. |
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What are examples of organs? |
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Definition
Stomach, heart, brain & lungs. |
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What is the job of the heart? |
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Definition
Pumps blood through your body. |
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What kind of tissue does the heart contain? |
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Definition
All four - muscle, nervous, connective & epithelial. |
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A group of organs that work together to perform a major function. |
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How many organ systems does the human body contain? |
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What do the integumentary, skeletal & muscular organ systems do? |
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Definition
Provide structure & allow movement. |
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What do the circulatory, respiratory, digestive, excretory, immune & reproductive systems do? |
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Definition
Carry out the process of life. |
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What do the nervous & endocrine systems provide? |
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Control over body process. |
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For each system to function, what must happen? |
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It's organs, tissues & cells must work together. |
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Circulatory, Endocrine, Excretory, Digestive, Immune, Integumentary, Muscular, Nervous, Reproduction, Respiratory, Skeletal. |
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Carries food & oxygen to all the cells. Transportation network. |
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Releases hormones by a collection of glands. |
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Protects body from disease. |
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Receives information & commands the body to respond. |
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Lungs - moves air in & out of the body. |
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Bones & connective tissue. |
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What is the body's largest organ? |
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What are the major organs of the excretory system & what are their function? |
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Definition
2 Kidneys - they remove waste & needed material from the blood. Filtering factories. |
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Where is urine stored till is leaves the body? |
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Definition
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Waste from the kidneys is combined with water. |
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Proteins that destroy pathogens. |
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Destroys pathogens before they cause disease. |
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Chemicals that change the activity in your body's cells. |
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Tissues that produce & release hormones. |
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Internal balance. Your internal enironment is kept stable despite the outside enironment. |
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How does your body maintain homeostasis? |
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Definition
When your too warm, your body sweats to cool down. When you are cold, you shiver, which produces heat. |
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What does your muscles do when you shiver? |
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Definition
Rapidly contract & relax. |
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Body's reaction to threatening events by releaseing adrenaline. Ex: fast heart beat & increased breathing…..like when you finish a dance on stage. |
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Chemical that gives you a burst of energy & prepares your body for action. It's released into the blood stream by endocrine system. |
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What's the difference between tissues & organs? |
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Definition
Tissues are cells that produce the same function & organs are different tissues that do a specific job. |
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