Tissues Ch 5 Distinguish among the four major

Tissues Ch 5 Distinguish among the four major

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

Loose Areolar Adipose Reticular Dense Cartilage Hyaline Elastic Fibrocartilage Bone Blood

Understanding membranes Epithelial membranes thin, sheetlike structures covering body surfaces and lining body cavities Serous membranes secrete watery fluid; line cavities that lack an outside opening (thorax and abdomen) Mucous membranes goblet cells secrete mucus; digestive, respiratory, urinary, reproductive Cutaneous membranes skin Synovial lines joints Mucle Tissue

Able to contract Cells muscle fibers shorten and thicken to move body parts Three Types Mucle Tissue Skeletal Attached to bones Voluntary

Striations Many nuclei in one cell Mucle Tissue Smooth No striations Walls of hollow organs bladder, stomach, intestines, etc Involuntary One nucleus Mucle Tissue

Cardiac Only in the heart Striated Branched Intercalated discs Involuntary One nucleus Nervous Tissue

Found in brain, spinal cord, and nerves Neurons = basic cells; Neuroglia = supportive cells Coordinate, integrate, and regulate body functions Ner vou s Tis sue Ne uro

ns Ne uro glia Dont easily divide Sense changes and transmit electrical impulses Pic: red Divide easily Nourish and support neurons

Pic: blue Review Assignment Pg 114-115 Chapter Assessment Qs #2, 3, 6-19 Integrative Assessment/Critical Thinking #1-4

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