Sparse cell population in an extensive extracellular

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sparse cell population in an extensive extracellular matrix space filling helps withstand stresses there are 6 major types in vertebrates... Loose Connective Tissue cells : most common type of connective tissue form : a loose weave of collagenous fibres functions : provides a flexible framework around organs, blood vessels, nerves, muscle; holds tissues and organs in place fig. 40.5 (part 2) Connective i Q. What are the 3 main types of proteinacious fibres found in connective tissue? Describe each type. (Hint: see text p.857)
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Animal Form and Function 11 Fibrous Connective Tissue cells : form : densely packed regular or irregular masses of collagenous fibres regular fibrous connective tissues have high tensile strength e.g. ligaments and tendons irregular fibrous connective tissues are impact resistant Adipose Tissue cells : form : a specialized loose connective tissue functions : fuel storage, insulation, cushions tissues and organs Cartilage cells : form : matrix is collagenous; strong, flexible / pliable; avascular; functions : skeletal material forms skeleton in vertebrate embryos & some adult vertebrates (e.g. shark) resists compression Bone cells : hard, strong, lightweight, weight-bearing tissue of skeleton; vascularized form : mineralized, hardened matrix of collagen fibres + ground substance with Ca ++ salts compact bone... spongy bone... functions : skeletal material protects organs provides internal support and attachment sites for muscle Blood cells : (see fig. 42.17) form : a connective tissue with a fluid matrix... plasma functions : material transport transports gases, enzymes, hormones, etc. to cells carries away wastes
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Animal Form and Function 12 MUSCLE TISSUE most abundant tissue of most animals major user of food energy and a major source of body heat involved in movement of body parts / whole body (cells contract when stimulated) Skeletal Muscle cells : functions : responsible for voluntary movement of large muscles of trunk / limbs Smooth Muscle cells : functions: responsible for involuntary movement of blood vessel walls, digestive system (peristalsis), stomach, bladder, uterus; do not contract as rapidly as skeletal muscle, but can maintain tension Cardiac Muscle cells : functions : responsible for involuntary contractions of heart fig. 40.5 (part 3) Muscle
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Animal Form and Function 13 NERVOUS TISSUE cells : neurons have 2 types of processes ... dendrites : receive and transfer messages to cell body axons : transfer messages away from cell body functions: (see Nervous Systems notes for details) various tasks... all involve communication ... relays info about interior/exterior environment relays info from one part of body to another fig. 40.5 (part 4) Nervous
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Animal Form and Function 14 COORDINATION AND CONTROL there are two major control and coordination systems in animals...
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