Tissues Ch 5 Distinguish among the four major types of tissue with respect to their structure, function, and location. Tissue Structure Function Location Type Epithelial Connective Muscle Nervous
Distinguish among the four major types of tissue with respect to their structure, function, and location. Tissue Structure Function Location Type Epithelial Tightly packed Protective coverings; Body surface; cover secretion; internal organs absorption
Connective Spread out Bind, support, protect, fill spaces, store fat, produce blood cells Throughout the body Muscle Three types: skeletal, smooth, cardiac
Movement Attached to bones; heart; walls of internal organs Nervous Mostly long and thin to transmit impulses Coordination, regulation, integration, and sensory reception Brain, spinal cord,
nerves Journal 8/13: Connective, Epithelial, Muscular, or Nervous? A. B. C. D. E. F. G. Bone and blood are examples Used in movement Skin Most widespread type Heart
Protection Binds, supports, fills spaces Transmits electric impulses I. Attached to bones J. Covers body surface and organs K. Coordination and integration L. Very tightly packed M. Brain, spinal cord H. Epithelial Tissue
Throughout the body Tightly packed. Covers organs, lines body cavities, and lines hollow organs. Typically do not have much blood supply. Epithelial Tissue Anchored to connective tissue by a basement membrane. Readily divide, so wounds heal quickly. Different types of epithelium:
Two Factors Cell Shape Squamous flat Cuboidal cube-shaped Columnar long and thin Number of Layers Simple one layer Stratified more than one layer Different types of epithelium: Simple Squamous air sacs of lungs, walls of capillaries, blood vessel walls...
Simple Cuboidal covers ovaries, kidney tubules... Simple Columnar uterus, digestive tract... Different types of epithelium: Stratified Squamous skin, oral cavity, anal canal... Stratified Cuboidal mammary glands, sweat glands, pancreas... Stratified Columnar male urethra, ductus deferens, pharynx... Different types of
epithelium: Pseudostratified Columnar Looks stratified, but its actually one layer; found in respiratory system. Transitional epithelium changes in response to the situation; bladder, ureters... Glandular epithelium Used to secrete substances (usually columnar or cuboidal.) Classification of Glands Type of Gland
Secretes... Example Endocrine Into blood or other fluid Hormone secretion Classification of Glands Type of Gland Secretes... Example Endocrine
Into blood or other fluid Hormone secretion Exocrine Into ducts on open surfaces - Merocrine - Apocrine - Holocrine Classification of Glands Type of Gland Secretes... Example
Endocrine Into blood or other fluid Hormone secretion Exocrine Into ducts on open surfaces - Merocrine - Apocrine - Holocrine Through exocytosis Salivary, pancreatic, sweat
Classification of Glands Type of Gland Secretes... Example Endocrine Into blood or other fluid Hormone secretion Exocrine Into ducts on open surfaces - Merocrine
Through exocytosis Salivary, pancreatic, sweat - Apocrine With small portions of the cell Mammary, ear canal - Holocrine Classification of Glands Type of Gland Secretes...
Example Endocrine Into blood or other fluid Hormone secretion Exocrine Into ducts on open surfaces - Merocrine Through exocytosis Salivary, pancreatic, sweat
- Apocrine With small portions of the cell Mammary, ear canal - Holocrine with entire cells that disintegrate Sebaceous (skin) Journal 8/14 Which tissue type is characterized by...
Fills in spaces, binds, protects Composes glands Sends impulses for communication Most widely distributed Forms protective coverings Involved in movement Includes brain and spinal cord Connective Tissue
Bind structures, support, protect, serve as framework, store fat, fill spaces, make blood cells, protect against infections, and help repair tissue damage Further apart than epithelial cells Connective Tissue They have an extracellular matrix between their cells. Most can divide. Most have good blood supply.
Connective Tissue Cells Cell Types Fibroblasts produce fibers Macrophages scavenger and defensive cells through phagocytosis Mast cells prevents blood clotting and reacts to outsiders Connective Tissue Fibers
Collagenous fibers collagen; long parallel bundles; flexible, but not elastic; dense; appear white Elastic fibers spring-like elastin; weaker, but easily stretch and bouce back; appear yellow Reticular fibers thin collagenous fibers; form delicate supporting network Types of Connective Tissue Loose Connective Tissue
Areolar delicate, thin membranes; mostly fibroblasts; collagenous and elastic fibers Adipose fat Reticular thin collagenous 3-D network; framework for organs Types of Connective Tissue Dense Connective Tissue closely packed collagenous and elastic fibers; withstands pulling forces; poor blood
supply and tissue repair Types of Connective Tissue Cartilage rigid; support, framework, attachment, etc; abundant extracellular matrix; divides infrequently and heals slowly Hyaline fine collagenous fibers Elastic dense elastic fibers Fibrocartilage tough tissue; shock absorber
Types of Connective Tissue Bone most rigid; bone cells = osteocytes Blood transports materials; extracellular matrix = plasma; red, white, platelets Types of Connective Tissue
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This project is supported by the National Institute of Food and Agriculture, U.S. Department of Agriculture, under award number 2015-38640-23781 through the North Central Region Sustainable Agriculture Research and Education program under sub-award number ONC16-013.
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