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 Each part of the body has a specific function, or job.  The levels of organization in the human body consists of: › Cells › Tissues › Organs › Organ.

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Presentation on theme: " Each part of the body has a specific function, or job.  The levels of organization in the human body consists of: › Cells › Tissues › Organs › Organ."— Presentation transcript:

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2  Each part of the body has a specific function, or job.  The levels of organization in the human body consists of: › Cells › Tissues › Organs › Organ systems

3  Cell theory: a cell is the basic unit of structure and function of a living thing  Structure: › Membrane › Cytoplasm › Nucleus  Functions: cellular respiration, grow, reproduce, excrete waste

4  Muscles tissue › Can contract (shorten) to move the body  Nervous tissue › Directs and controls › Carries electrical messages  Connective tissue › Provides support and connects: › bone and fat  Epithelial tissue › Skin › lining of digestive system

5  11 organ systems: › Integumentary › Skeletal › Muscular › Circulatory › Respiratory › Digestive › Excretory › Immune › Reproductive › Nervous › Endocrine

6  Skin, hair, and nails make up your body’s covering  Create a barrier  Regulate your body temp  Remove waste – perspire  Works with nervous system to give info about your environm.

7  Bones and other connective tissues  Supports the body and gives it structure  Protects body’s organs  Produce bloods cells  Connective tissues attaches bones together

8  Move the body by pulling on the skeleton  Involuntary muscles work by themselves  Muscles and bones: musculoskeletal system  Cells – fibers – muscle groups

9  Transportation network – carries food and oxygen  Collects waste  Transports blood  Powered by pumping of blood: heart  Away: arteries  To: veins  Capillaries: smallest – connect the arteries and veins- reach every cell

10  Lungs : takes in oxygen and disposes of carbon dioxide  Air moves into the lung then to the capillaries  Oxygen crosses into the blood  Lung expands due to the actions diaphragm.

11  Digestion: breakdown of food into small molecules the body can use  Liver produces bile and pancreas makes enzymes which help break down the food  Water is removed in large intestine

12  Body makes excess water and waste  Excretory system removes these waste products  Kidneys has nephrons which filters blood  Urine flows from kidney to urinary bladder

13  Protects the body from disease-causing bacteria and viruses(pathogens)  White blood cells attack and destroy viruses or make antibodies (proteins)  The immune system remembers the past pathogens and destroys them quicker the next time. (immunity)

14  Organs that produce sex cells  Sex cells carry DNA – information  Organs can also produce chemicals that regulate the physical development

15  Takes info from envir and body – processes this info and commands the body to respond  Some times, you control the brain, in other times, the brain decides for you (involuntary)  Brain + spinal cord + nerve cells

16  Helps regulate the activities of the organs by releasing hormones (chemicals that change the activity in cells)  Collection of glands (tissues that produce and release hormones)  Brain signals how much hormones to produce

17  Process by which an organism’s internal environment is kept stable in spite of changes in the external environment  Warm blooded… 37 °C – even when it’s cold or hot  Sweating… or shivering  Stress : reaction of your body to potentially threatening, challenging, or disturbing events.- body produces adrenaline to carry more oxygen to body cells.


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