1. Epithelial Cells form Epithelial Tissue Structure: – Epithelial Cells pack tightly together and form continuous sheets that line different parts of the body. Function: – Protection, secretion, absorption, and transport Examples: – Inside the mouth (cheek cells) – Line organs like the stomach – Surround the outside of organs – Make the outer layer of skin

2. MUSCLE TISSUE Structure: – Muscle cells make specialized tissue that can contract. – Muscle tissue contains the specialized proteins actin and myosin that slide past one another. Function: – Allows for movement of limbs and contraction. Examples: – Heart – Cardiac Muscle – Body Movement—Skeletal Muscle – Digestive Tract, Veins/Arteries, Bladder—Smooth Muscle

3. NERVE TISSUE Structure: – Elongated cells with many branches. Function: – Has the ability to generate and conduct electrical signals in the body. – These signals are managed by the brain and transmitted down the spinal cord to the body.

4. White Blood Cell Structure: – Large, flexible cells – Covered in proteins that recognize invaders. Function: – Part of your immune system. – Fight off bacteria and other invaders. Examples: – Neutrophils – engulf bacteria – Basophil – Release histamine to promote and inflammatory response.

5. Plant Leaf vs. Plant Stem Leaf – Contains Guard Cells that open and close to allow for gas exchange – Lined with Chloroplasts Stem – Contain Xylem and Phloem that carry food and water up the stem of the plant.

6. Levels of Organization 1.Cells 2.Tissues – groups of individual cells 3.Organs – groups of tissues working together 4.Organ Systems – groups of organs that work together for a specific function 5.Organism