Human Histology

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Outcome: By the end of the lesson you will be able to: -define the concept of histology by analyzing a picture. -identify the different types of tissues. -know the vocabulary related to “Human Histology”.

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San Ignacio de Recalde School Subject: Science By Lic . Isabel Janeth Del Rosario López Mejía BLOGS : http://sciencejl.blogspot.com/ http://englishisfun-janeth.blogspot.com/

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By Lic. Janeth López Topic: Human Histology By the end of the lesson you will be able to: Define the concept of histology by analyzing a picture. identify the different types of tissues. know the vocabulary related to “Human Histology”. Outcome: Dense Irregular Connective Tissue

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By Lic. Janeth López degradation of a substance. Gelatin is a protein, made from the hydrolysis of collagen, a protein that makes up about a third of all mammalian tissue. Collagen is what makes up much of the connective tissue, tendons, and the protein part of bones. 

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Histology is the anatomical study of the microscopic structure of animal and plant tissues. By Lic. Janeth López Topic: Human Histology Neural Tissue

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By Lic. Janeth López Types of tissues covers the body surface and forms the lining for most internal cavities. a voluntary type of muscle tissue that is used in the contraction of skeletal parts. composed of specialized cells which not only receive stimuli but also conduct impulses to and from all parts of the body. perform a variety of functions including support and protection

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Functions of Connective tissue found everywhere in the body except the central nervous system. usually derives from the  mesoderm Storage of energy Protection of organs Composed of scattered cells that form a matrix Connection of epithelial tissues to muscle fiber. Supply of hormones all over the body Nutritional support to epithelium Site of defense reactions Loose Connective Tissue with Elastic Fibers Structure

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Types of Connective tissue

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By Lic. Janeth López Classification of Connective Tissue I.   Connective Tissue Proper ( all organs and body cavities connecting and separating cells … This is a very large and diverse group of tissues and includes adipose tissue (fat), areolar (loose) tissue, and dense regular tissue, among others. II.    Specialized Connective Tissues  -- this group includes cartilage, bone, and blood.  Cartilage and bone form the skeletal framework of the body while blood is the vascular (transport) tissue of animals.

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Features of Connective tissue Tissue Location Collagenous fibers tendon, ligament, skin, cornea, cartilage, bone, blood vessels, gut, and intervertebral disc. Elastic fibers extracellular matrix Reticular fibers liver, bone marrow, lymphatic organs Cells surrounded by extra cellular matrix: fibers (collagen and elastine ) and ground substances. Some fluid (blood)

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filters, absorbs, and diffuses various substances forms a protective barrier that regulates permeability is involved in sensory perception and bodily secretions.  acts as an interface between the body and the rest of the world. produced specialized segregation. ciliated epithelia move materials across their surface. Functions of the Epithelial tissue Basement membrane

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By Lic. Janeth López Types of Epithelial tissue

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Features of Epithelial tissues Little or no intercellular material. Cells are usually joined by specialized cell to cell junctions.

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Nervous Tissue Dendrites receive impulses and carry them toward the cell body. Axon carries impulses away from the cell body. Synapse Neuronal junction where electrical impulses are transferred from one cell to the other. Features of The neuron made up of different types of nerve cells.

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Nervous Tissue Neuron(Brain cell) is a cell specialized to conduct electrochemical impulses called nerve impulses or action potentials. Neuroglia ( glia ) are cells that support and protect nerve cells. Supporting cells

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Functions of Nervous Tissue Sensory input (receive and process information) integration (neurons transmit electrical impulses) Controlling muscles and glands Homeostasis (regulates the inner environment to ensure stability) Mental activity (Brain is comprised of nervous tissue)

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Muscle tissue Cardiac muscle Skeletal muscle Smooth muscle A basic biological soft tissue that composes muscles. Types of Muscle tissues

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The Features of Muscle tissue formed during embryonic development. gives rise to the muscles ability to contract. produce force and cause motion, either locomotion or movement within internal organs Contain contractile proteins ( actin and myosin) found in the cytoplasm of muscle cells.

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Properties of Muscle tissue contractility: ability to shorten (contract) forcibly elasticity: ability to stretch and rebound excitability: ability to undergo neural stimulation extensibility: ability to lengthen (extend) Cardiac muscle Structure

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By Lic. Janeth López Let’s review these questions for the Monthly exam

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Muscle tissues Cardiac muscle Skeletal muscle Smooth muscle Which one is concerned with the muscles that are visible just under the skin, particularly of the limbs? Which one is referred to as voluntary muscles that move bones and produce movement? Which one is a striated, multinucleated muscle that requires signaling from the nervous system to trigger(provoke, induce)contraction?

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Muscle tissues Cardiac muscle Skeletal muscle Smooth muscle Which one is concerned with various involuntary movements, such as having one’s hair stand on end when cold or frightened, or moving food through the digestive system? Which one assists in moving materials in the walls of internal organs, blood vessels, and internal passageways? Which one is a nonstriated , mononucleated muscle in the skin that is associated with hair follicles?

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Muscle tissues Cardiac muscle Skeletal muscle Smooth muscle Which one is concerned with pumping blood through the circulatory system. ? Which one is under involuntary control? Which one is joined to one another at intercalated discs and under regulation of pacemaker cells ? Which ones are striated muscle ?

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HOMEWORK Research Information How do the structures of sperm cells and epithelial cells in the stomach differ?

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Analyze What are some of the reasons that multicellular organisms need specialized cells? ?

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Bibliography: Basic Bibliography De Salle, Rob; Heithaus , Michael(2008). Holt Biology. United States of America. Holt, Rinehart and Winston. http://vihmh.impelsys.com/hmd_biology/index.php http://www.bbc.co.uk/science/humanbody/body/interactives/3djigsaw_02/index.shtml?organs Electronic Bibliography About.com( 2014) Biology [on line]. Available at: ttp://biology.about.com/od/anatomy/a/aa072007a.htm By Lic. Janeth López I hope these links help you learn more in terms of science.

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By Lic. Janeth López Thank you Very much for your attention

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Contact You can contact me at: Blog: http://englishisfun-janeth.blogspot.com/ By Lic. Janeth López

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