9.19_Body_Organization

9.19_Body_Organization - Ex: respiratory= nose, pharynx,...

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Body Organization - Cell - Each have same genetic info until specialized -Unspecialized specialized -Undifferentiated differentiated -Four basic types of specialized cells 1. Muscle - Help move. Generate mechanical force 2. Nerve - Pass Info. Initiate and conduct electrical signals 3. Epithelial - regulate interactions w/ environment. Organ walls ext 4. Connective - Connect, anchor, and support -Bone Cells -Red blood cells -White blood cells -Fat-stores - Tissues - Associations of similar specialized cells -Same four types (muscle, nerve, epithelial, and connective) but misused - Organs - Association of all four types (muscle, nerve, epithelial, and connective) -Functional units: Smallest yet still work Ex: Kidneys=nephron Lung- alveoli Heart- None (need whole heart) -Some can’t be broken in functional units (such as heart) -We have functional Units because of redundancy and expansion - Organ System - Collections of organs that sere a function
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Unformatted text preview: Ex: respiratory= nose, pharynx, larynx, trachea, bronchi, alveoli.-Also, organs and organ systems Ex: Immune system= white blood cells, lymph vessels, lymph nodes, spleen, thymus, circulatory system. Cells Tissues Organs Organ system Is that all? NO- thats JUST CELLULAR Extracellular- Fluid and Matrix Matrix- Mixture of proteins and minerals Function: Provide structure (eg scaffolding) Transmit information Composition: Fibers- collagen (ropes) and elastin (rubber bands) Nonfiberous protein- carbohydrate based. Fluid- 3 compartments 1) intracellular fluid (w/in cells) 2) Extracellular fluid (btw cells)-actual external environment for cells 3) Plasma- fluid portion of blood-always w/in a blood vessel Plasma< interstitial fluid > intracellular Capillarity wall cell membrane Barriers to exchange problemwhy? B/c theres limited movement exp. Proteins....
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