Presentation on theme: "Unit 10 Human Body Systems"— Presentation transcript:
1 Unit 10 Human Body Systems Searcy Ninth Grade Center 2012
2 Levels of Organization The levels of organization in a multicellular organism include cells, tissues, organs, and organ systems.OrganismOrgan SystemOrgansTissuesCellsAtoms
3 Cell Types and TissueA cell is the basic unit of structure and function in living things. Specialized cells are uniquely suited to perform a specific function.Tissues are groups of cells that perform a specific function.Muscle Tissue: along the bones, enables body to move.Epithelial Tissue: glands and tissues that cover interior and exterior body surfaces.Connective Tissue: provides support for the body and connects its parts.Nervous Tissue: transmits nerve impulses throughout the body.
4 Cell OrganizationEach organ in your body, which are made of tissues, is part of an organ system, a group of organs that work together to perform a major function.
5 Nervous System Structures: Function: 1. Central Nervous System (CNS) 2. Brain3. Spinal Cord4. Peripheral Nervous System (PNS)Somatic-voluntaryAutonomic-involuntaryFunction:Recognizes and coordinates the body’s response to changes in its internal and external environments.
6 Digestive System Structures: Function: Mouth Pharynx Esophagus Stomach Small IntestineLarge IntestineLiverGall BladderRectumFunction:Converts foods into simpler molecules that can be used by the cells of the body; absorbs food; eliminates waste.
7 Excretory System Structures: Function: Kidneys Ureters Urinary bladder SkinLungsKidneysUretersUrinary bladderUrethraFunction:Eliminates waste products from the body in ways that maintain homeostasis.
8 Lymphatic/Immune System Structures:White blood cells (T-cells)ThymusSpleenLymph nodesLymph vesselsFunction:Helps protect the body from disease; collects fluid lost from blood vessels and returns the fluid to the circulatory system.
9 Integumentary System Structures: Function: Skin Hair Nails Sweat glandsOil glandsFunction:Serves as a barrier against infection and injury; helps to regulate body temperature; provides protection against ultraviolet radiation from the sun.
10 Skeletal System Structures: Function: Bones Cartilage Ligaments TendonsFunction:Supports the body; protects internal organs; allows movement; stores mineral reserves; provides a site for blood cell formation.
11 Muscular System Structures: Function: Skeletal muscle Cardiac muscle Smooth muscleFunction:Works with the skeletal system to produce voluntary movement; helps to circulate blood and move food through the digestive system.
12 Circulatory System Structures: Function: Heart Blood vessels Blood ArteriesVeinsCapillariesBloodFunction:Brings oxygen, nutrients, and hormones to cells; fights infection; removes cell wastes; helps to regulate body temperature.
13 Respiratory System Structures: Function: Nose Pharynx Larynx Trachea LungsBronchiBronchiolesAlveoliFunction:Provides oxygen needed for cellular respiration and removes excess carbon dioxide from the body.
14 Endocrine System Structures: Function: Hypothalamus Pituitary Thyroid ParathyroidsAdrenalsPancreasOvaries (in females)Testes (in males)Function:Controls growth, development, and metabolism; maintains homeostasis.
15 Reproductive System Structures: Function: Testes, epididymis, vas deferens, urethra and penis (in males).Ovaries, Fallopian tubes, uterus, and vagina (in females)Function:Produces reproductive cells; in females, nurtures and protects the developing embryo.