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19 Cards in this Set
- Front
- Back
tissues
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- a collection of cells
- types of tissue: epithelial tissue, connective tissue, muscle tissue, nervous tissue |
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epithelial tissue
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- sheets of tightly packed cells sitting on a basal lamina (basement membrane)
- found on body coverings |
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structure of epithelial tissue
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- shape: squamous (flattened), columnar (column shaped), cuboidal (cube shaped)
- layering: simple (one layer on top of basal lamina), stratified (more than one layer), pseudostratified (irregular, inconsistent shape) |
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connective tissue
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- sparse population of cells in extracellular matrix
- web of fibers - bind and support other kind of tissues: loose CT, fibrous CT, cartilage, bone. - adipose tissue, blood |
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fibrous connective tissue
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- tendons (muscle to bone)
- ligaments (bone to bone) - lots of collagenous fibers |
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loose connective tissue
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- holds organs in place
- connects epithelia to underlying tissue. - few collagenous fibers. |
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adipose tissue (connective)
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- stores fat in adipose cells
- insulates and pads - store energy |
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blood (connective tissue)
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- liquid extracellular matrix (plasma)
- carries nutrients and wastes - O2 and CO2. |
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cartilage (connective tissue)
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- chondrocytes (type of cell)
- condroitin matrix- what makes it rubbery |
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bone (connective tissue)
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- osteoblasts (type of cell)
- mineralized matrix |
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muscle tissue
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- long cells
- capable of contracting (excitable, or by nerve signals) - most abundant tissue - three kinds of muscle tissue |
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skeletal (striated) muscle tissue
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- related to voluntary movements
- very strong - fatigues easily |
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smooth muscle tissue
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- shorter cells (spindle shaped)
- branched fibers - involuntary movements (internal organs). - capable of sustained contraction |
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cardiac muscle tissue
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- only found in the heart
- kind of striated, but branched - must be capable of sustained activity |
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nervous tissue
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- neurons - the functional unit of the nervous system.
- excitable - carry nerve impulses - control and coordination. |
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homeostasis
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- the maintenance of a steady state
- negative feedback |
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endothermic
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- body temperature stays relatively constant
- capable of intense and prolonged activity - requires a lot of energy - have a basal metabolic rate |
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ectothermic
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- body temperature is not constant
- incapable of intense and prolonged activity - requires a lot less energy - has a standard metabolic rate |
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____ influences metabolic rate of endotherms
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size
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