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Cells to Systems !!. Cells are the smallest living part of living things- --where do we go from there?. Remember that cells are:. The basic units of structure and function of all living things. What is the cell theory? 1. All living things are composed of cells.

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cells to systems

Cells to Systems!!

Cells are the smallest living part of living things---where do we go from there?

remember that cells are
Remember that cells are:
  • The basic units of structure and function of all living things.
  • What is the cell theory?
    • 1. All living things are composed of cells.
    • 2. Cells are the basic units of structure and function in living things.
    • 3. All cells are produced from other cells.
cells are put together into groups of cells which make tissues
Cells are put together into groups of cells which make tissues
  • There are many different types of tissues in living organisms.

This is muscle tissue:

connective tissue
Connective tissue
  • Connective tissue is generally strong and hooks muscle to bone or bone to bone. This would be like tendons and ligaments.
what about epithelial tissue
What about epithelial tissue?
  • This is “skin” type tissue. As you can see, there are several types-the one you know best is epithelial—like the top layer of your skin.
so take a closer look
So—take a closer look---
  • Look how many “things” are in your skin---by the way, your skin is your largest organ.
  • Sweat glands
  • Muscles
  • Hair follicles
  • Oil glands
  • Fat cells
  • New skin waiting
    • to grow through.
another important tissue is nervous tissue
Another important tissue is “nervous” tissue
  • Nerve cells allow us to move and
  • feel. If the messages are cut off,
  • our body cannot respond or feel
  • heat, pain, pressure.
what happens after cells make tissues
What happens after cells make tissues?
  • The tissues actually make organs. Different tissues make up different organs.
  • Organs are things like a stomach, brain, liver, kidney, heart, and pancreas.
after organs next is the body system itself
After organs next is the body “system” itself
  • How many systems are there?---9
  • Nervous system
  • Skeletal system
  • Muscular system
  • Integumentary system (skin)
  • Circulatory system
  • Digestive system
  • Urinary system
  • Reproductive system
  • Respiratory system
nervous system
Nervous system
  • Your brain, spinal cord
  • and all nerves are in
  • this system. Your
  • brain tells your hand
  • to move and the
  • message goes from
  • the brain down the
  • spinal cord and out to
  • the hand via the
  • nerves that run in
  • your arm. If your hand touches
  • a hot iron, than the nerves run
  • up the arm, into the spinal cord
  • and up to the brain to register
  • that “ouch” was in order-your
  • brain tells you to jerk your hand
  • out of the way and say ouch!
skeletal system 206 bones
Skeletal system-206 bones
  • This is a system of support and
  • also gives you structure.
  • It gives your shape and allows
  • movement. You could not
  • move without bones and you
  • would merely be a pile of
  • Mush—like a blob!
muscular system 600
Muscular system-600+
  • Muscles help you move
  • and work and also
  • give your shape.
integumentary system
Integumentary system
  • This is your largest
  • organ and covers
  • your whole body.
  • It is your skin!!
circulatory system
Circulatory system
  • Red shows
  • your arteries.
  • Blue shows
  • your veins.
  • Arteries take
  • blood away
  • from the heart
  • and out to the
  • body--
  • veins take
  • blood back from
  • the body to
  • the heart.
digestive system
Digestive System
  • Begins at your mouth
  • and ends at the anus.
  • includes many organs
  • along the way to take
  • the nutrients out of
  • the food you eat and
  • then get rid of the
  • waste that your body
  • does not need.
urinary system
Urinary system
  • Here is where the
  • liquid waste from
  • your body is taken
  • care of. Also any
  • needed liquids are
  • processed and sent
  • through the body.
reproductive system
Reproductive system
  • Male and female differ in structure. The organs are meant to carry on the human species.
  • Sexual reproduction needs a male and a female. If this is done in a lab or a petri dish like artificial insemination, the cells from a male and female are still required.
  • Remember—a living cell comes from another living cell.
respiratory system
Respiratory system
  • This is how your
  • body gets it’s needed
  • oxygen and also rids
  • itself of the CO2
  • wastes.
all body systems have a function
All body systems have a function.
  • All body systems are made with the correct organs to perform the required function for the organism.
  • If something does not run correctly—the organism would most likely not feel “right”!
  • What happens if the organism’s systems could not become better---disease or death. 
so to review what you learned
So—to review what you learned:
  • Cells make up tissues.
  • Tissues make up organs.
  • Organs make up systems.
  • Systems make up the organism.