5 Chemicals divided into two major inorganic chemicalsEx: H2O, 02 and CO2Organic chemicalsEx: Carbohydrates, Fats, Proteins, and Nucleic Acids
6 cells are the smallest living subunits of organisms 2. Cellular Levelcells are the smallest living subunits of organismsmany different types of cellsEach made of chemicals and carries out specific chemical reactions.
7 3. Tissue LevelA tissue is a group of cells with similar structure and function
9 1. Epithelial Covers or lines body surfaces Examples: outer layer of the skin,line the various cavities and tubes of the body
10 2. ConnectiveConnects and supports parts of the body; some transport or store materialsSupportingcartilage. Example: the outer earbone.BindingTendons connect muscle to bone.Ligaments connects one bone to another
11 3. Muscle Specialized for contraction, which bring about movement 3 Types of muscle tissueSkeletal muscle - contraction provides the force of locomotion and other voluntary body movements.Smooth muscle lines the walls of the hollow structures of the body, such as the intestine, urinary bladder, uterus, and blood vessels. Its contraction, which is involuntary, reduces the size of these hollow organs.cardiac muscle – makes up the heart
12 4. NerveSpecialized to generate and transmit impulses that regulate body functionsExamples: the brain and optic nerves
13 4. Organ LevelAn organ is a group of two or more different types of tissues that has a specific functionExamples: heart, brain, kidneys, liver, lungs
14 5. Organ SystemsAn organ system is a group of organs that contribute to a particular function.
15 Integumentary SystemThe skin and structures derived from it, such as hair, nails, and sweat and oil glands.Protects the body, helps regulate body temperature, pressure and pain.
16 Skeletal SystemMade up of bones and ligamentsSupports, protects provides framework
17 Muscular SystemSpecifically refers to skeletal muscle tissue and tendonsBrings about movement, maintaining posture and produces heat
18 Circulatory SystemThe heart, blood, and blood vesselsTransports oxygen and nutrients to tissues and removes waste
19 Lymphatic SystemThe lymph, lymphatic vessels, and structures containing lymph tissue (spleen and lymph nodes)Cleans and returns tissue fluid to the blood and destroys pathogens that enter the body
20 Nervous SystemThe brain, spinal cord, nerves, and sense organs, such as the eye and earInterprets sensory information, regulates body functions such as movement by means of impulses
21 Endocrine SystemAll hormone producing glands and cells such as the pituitary gland, thyroid gland, and pancreasRegulates body functions by means of hormones
22 Respiratory SystemThe lungs and a series of passageways, such as the pharynx(throat), larynx (voice box), trachea (windpipe), and bronchial tubesExchange oxygen and carbon dioxide between the air and blood
23 Digestive SystemGastrointestinal tract (GI) and organs such as the salivary glands, liver, gallbladder and the pancreasBreaks down and absorbs food for use by cells and eliminates solid and other waste
24 Excretory System (Urinary System) The kidneys, urinary bladder, and urethraRemove waste products from the blood and regulates volume and pH of blood
25 Immune SystemConsists of several organs, includes the lymph nodes, spleen, blood vessels, bone marrowas well as white blood cells (WBC)Provides protection against infection and disease
26 Reproductive SystemOvaries, uterus, mammary glands (woman)Testes (men)Produces eggs and spermIn women, provides a site for the developing embryo-fetus