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

TThe basic units of structure and function of all living things. WWhat is the cell theory? 11. All living things are composed of cells. 22. Cells are the basic units of structure and function in living things. 33. All cells are produced from other cells.

 There are many different types of tissues in living organisms. This is muscle tissue:

 Connective tissue is generally strong and hooks muscle to bone or bone to bone. This would be like tendons and ligaments.

 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.

 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.

 Nerve cells allow us to move and  feel. If the messages are cut off,  our body cannot respond or feel  heat, pain, pressure.

 The tissues actually make organs. Different tissues make up different organs.  Organs are things like a stomach, brain, liver, kidney, heart, and pancreas.

 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

 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!

 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!

 Muscles help you move  and work and also  give your shape.

 This is your largest  organ and covers  your whole body.  It is your skin!!

 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.

 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.

 Here is where the  liquid waste from  your body is taken  care of. Also any  needed liquids are  processed and sent  through the body.

 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.

 This is how your  body gets it’s needed  oxygen and also rids  itself of the CO2  wastes.

 The actual organism!

 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. 

 Cells make up tissues.  Tissues make up organs.  Organs make up systems.  Systems make up the organism.