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What must humans do to stay alive?

What must humans do to stay alive?. Make a list!. Too Legit to Quit: Maintaining Life. Maintain Boundaries. Simple part  All organisms must keep what is inside in, and outside out! must be able to allow some specific things to move in and out. Movement. Includes:

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What must humans do to stay alive?

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  1. What must humans do to stay alive? Make a list!

  2. Too Legit to Quit:Maintaining Life

  3. Maintain Boundaries • Simple part  All organisms must keep what is inside in, and outside out! • must be able to allow some specific things to move in and out

  4. Movement • Includes: • Traveling point A to point B • Moving food • Pumping blood • Moving urine • Manipulating our surroundings Selma

  5. Responsiveness • To sense changes in the environment and be able to respond to it • Nervous cells are highly responsive (or irritable) but “all cells are irritable to some extent”

  6. Digestion • The breaking down of food into simple molecules • Molecules absorbed into the blood and used by our cells

  7. Metabolism • The sum of all chemical reactions! • Anabolism! • Catabolism! • Respiration! • Oh my! • Largely regulated by endocrine system (hormone secretion)

  8. Excretion • Waste removal! • Lots of ways • Breathing • Urinate! • Defecate

  9. Reproduction • Make new cells • Make new organism

  10. Growth • Increase in size of body or body part • Mr. Ward’s old words of wisdom: Cells divide; they don’t increase in size!

  11. With a group of up to 3 • Defend an argument for which function is the most essential to life!

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