System Interactions.

1. roots

   Annotations:

   • send water up to the plant through the xylem tubes
2. stems
   1. xylem

      Annotations:

      • brings water up from the roots
   2. phloem

      Annotations:

      • brings nutrients down from leaves
3. leaves

   Annotations:

   • have stomata to let air and water in and out of the plant send nutrients to the plant through the phloem tubes
   1. needles

      Annotations:

      • needles do not dry out as fast , so some plants keep their needles during the winter or during the dry seasons
      • don't have as many stomata as the leaves

Annotations:

• response to stimuli
• maintain stability and balance

1. tropisms
   1. phototropism
   2. thigmotropism
   3. gravitropism

Annotations:

• maintains balance

1. tissues
   1. organ
      1. organ system
         1. digestive
            1. appendix
            2. Ingestion
               1. mouth
                  1. pharynx
                  2. tongue
                  3. teeth
                  4. salivary glands
               2. substrate
               3. fluid
               4. bulk
               5. suspension
            3. digestion
               1. stomach
                  1. ruminants
                     1. 4 chambers
               2. pancreas
               3. liver
               4. small intestine
               5. gallbladder
            4. absorption
            5. elimination
               1. large intestine
               2. anus
         2. immune
         3. excretory
         4. circulatory
         5. endocrine
         6. nervous
            1. acquired
            2. innate
               1. phagocytes
         7. skeletal
         8. muscular
            1. viscera or smooth
               1. intestines
            2. skeletal
               1. attached to bones
            3. cardiac
               1. heart
         9. reproductive