18 HOMEOSTASIS My Beloved Cells I will miss you! If homeostasis is interrupted, cells suffer and sometimes die.The human body’s maintenance of a stable internal environment.My Beloved CellsI will miss you!
19 THE WORK OF CELLSOn a baseball team, every player has his job.Cells have their own positions (or jobs) in the body!
21 Groups of cells working together form a TISSUE There are 4 types of tissues:Epithelial TissueNervous TissueMuscle TissueConnective Tissue
22 EPITHELIAL TISSUECovers and protects underlying tissue. When you look at the surface of your skin, you see epithelial tissue
23 NERVOUS TISSUESends electrical signals through the body. It is found in the brain, nerves and sense organs.
24 MUSCLE TISSUEMade up of cells that can contract and relax to produce movement
25 CONNECTIVE TISSUEJoins, supports, protects, insulates, nourishes, and cushions organs. It also keeps organs from falling apart.
26 TISSUE + TISSUE= ORGANTwo or more tissues working together, form an organ.One type of tissue alone cannot do all of the things that several types working together can do.
27 ORGAN + ORGAN = ORGAN SYSTEM Organs working togethermake up an organ system.The failure of any part can affect the entire system
28 11 MAJOR ORGAN SYSTEMS Integumentary system Muscular system Skeletal systemCardiovascular systemRespiratory systemUrinary systemReproductive system.Nervous systemLymphatic systemDigestive systemEndocrine system
29 Integumentary SystemIncludes skin, hair, nails and their underlying tissuesIt’s Function is to:Protect us from germsExcrete wasteControls moistureContains nerve endingRegulates body temp
30 Function: Is movement and protection. Muscular SystemThree types of muscles:Smooth MuscleCardiac MuscleSkeletal musclePlus tendons & ligamentsFunction: Is movement and protection.
31 Skeletal System Bones & cartilage Frame & support, protect, store minerals, make blood cells
32 Cardiovascular System Heart, Veins, Arteries capillariesFunction:To transport oxygen & nutrients throughout the body
33 Respiratory System Lungs absorb oxygen and release carbon dioxide. Lungs, trachea and alveoliLungs absorb oxygen and release carbon dioxide.
34 Removes wastes from the blood and regulates body fluids. Urinary SystemRemoves wastes from the blood and regulates body fluids.
35 Reproductive System Testes, Penis Uterus, Ovaries Function: Offspring
36 Receives and sends electrical messages. Nervous SystemIncludes:Brain, Spinal Cord & NervesReceives and sends electrical messages.
37 Lymphatic SystemLymph Nodes & VesselsFunction:Returns leaked fluids to blood vessels and fights germs & Disease
38 Digestive System Function: Breaks down food into nutrients. Stomach & intestinesFunction:Breaks down food into nutrients.
39 Endocrine SystemGlands regulate body functions by sending out chemical messages.
41 DISCUSSION QUESTIONS1. Explain the relationship between cells, tissues, organs and organ systems.2. Compare the four kinds of tissues found in the human body.3. Describe a time when homeostasis was disrupted in your body.Which body systems doyou think were effected?
42 T/F QUICK QUIZHomeostasis is the maintenance of a stable internal environment.Epithelial tissue sends electrical signals throughout the body.Blood is a type of connective tissue.The endocrine system consists of skin, hair, nails and their underlyingtissue.5. The lymphatic system returnsleaked fluids to blood vessels.