BIO 213-F09 - Lecture 5 - The Systems of Animal Structure & Function

BIO 213-F09 - Lecture 5 - The Systems of Animal Structure & Function

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Unformatted text preview: The Biology of Animals Structure and Function Bio 213 Atoms Molecules Cells Tissues Organs Organisms Ecosystems Levels of Organization Red Blood Cells Oak Grassland Read Chapter 22 Organization: Tissues, Organs, Systems Animal Tissue • Epithelial • Connective • Muscular • Nervous Biological hierarchy • Cells – we are done with those for awhile! • Tissues – A group of similar cells that do a particular job or function • Organs – Two or more tissues that work together to perform a particular function(s) But first, What are the four tissue types? • Epithelium – Body coverings and linings • Nervous – Receives stimuli, conducts impulses • Connective – Supports & binds – Cartilage, bone, adipose, blood • Muscle – Moves the body What are the organ systems of the body?? • Integumentary (skin) • Nervous • Muscular • Skeletal • Circulat ory • Endocrine • Lymphati c • Respirat ory • Digestiv e • Urinary • Reproductive Homeostasis • “Staying the same” • Sensory receptors – detect a stimulus • Integrator – control center • Effectors – response Negative Feedback Loop • Built in mechanism to maintain homeostasis • Response reverses the effect • Positive feedback Æ End result is an amplifying affect Transport System Chapter 23 • Circulatory System Systemic Circuit Loop that carries blood to and from body tissues capillary beds of head and upper extremities (to pulmonary circuit) aorta (from pulmonary circuit) heart capillary beds of other organs in thoracic cavity capillary bed of liver capillary beds of intestines Location of the Heart • Heart is about size of a fist • Lies in thoracic cavity between the lungs • Enclosed in the pericardium Layers of Heart Wall • Pericardium; heart sac • Myocardi um – middle layer – cardiac muscle • Endocardium; the inner lining of the heart Heart Structure • Each side has two chambers – Upper atrium – Lower ventricle • Valves – between atria and ventricles – In vessels leaving the heart Heart Valves...
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BIO 213-F09 - Lecture 5 - The Systems of Animal Structure & Function

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