This document provides an overview of the four major types of tissues - epithelial, connective, muscular and nervous tissues. It describes their characteristics and key components. For epithelial tissues, it discusses the different shapes and layers of epithelium and provides examples. For connective tissues, it explains the two types and three kinds of fibers. It also describes specialized connective tissues like adipose tissue, cartilage and bone. For muscular tissue, it distinguishes between skeletal, smooth and cardiac muscle. Finally, it provides details about the cellular components and functions of blood.
Structurally, the skin consists of two layers which differ in function, histological appearance and their embryological origin. The outer layer or epidermis is formed by an epithelium and is of ectodermal origin. ... The skin and its appendages together are called the integumentary system. - [Source: Blue Histology - Integumentary System]
Chapter 50: Sensory and Motor MechansimsAngel Vega
KEY CONCEPTS
50.1 Sensory receptors transduce stimulus energy and transmit signals to the central nervous system
50.2 The mechanoreceptors responsible for hearing and
equilibrium detect moving fluid or settling particles
50.3 The diverse visual receptors of animals depend on light-
absorbing pigments
50.4 The senses of taste and smell rely on similar sets of sensory receptors
50.5 The physical interaction of protein filaments is required for muscle function
50.6 Skeletal systems transform muscle contraction into
locomotion
Structurally, the skin consists of two layers which differ in function, histological appearance and their embryological origin. The outer layer or epidermis is formed by an epithelium and is of ectodermal origin. ... The skin and its appendages together are called the integumentary system. - [Source: Blue Histology - Integumentary System]
Chapter 50: Sensory and Motor MechansimsAngel Vega
KEY CONCEPTS
50.1 Sensory receptors transduce stimulus energy and transmit signals to the central nervous system
50.2 The mechanoreceptors responsible for hearing and
equilibrium detect moving fluid or settling particles
50.3 The diverse visual receptors of animals depend on light-
absorbing pigments
50.4 The senses of taste and smell rely on similar sets of sensory receptors
50.5 The physical interaction of protein filaments is required for muscle function
50.6 Skeletal systems transform muscle contraction into
locomotion
Contraction of muscles takes place with relativity between Actin and Myosin Filaments. Here, Ach. regards to acetylchloine. Interaction between Actin and myosin will bring contraction in muscle.
A complete lecture of the Histology of Muscle Tissues, taught at First Moscow State Medical University, Moscow, in the Histology department, for the first year English medium foreign medical students.
Cartilage is a connective tissue structure that is composed of a collagen and proteoglycan-rich matrix and a single cell type: the chondrocyte. Cartilage is unique among connective tissues in that it lacks blood vessels and nerves and receives its nutrition solely by diffusion
I presented these slides to create awareness about adaptive planning and rationale behind it. This concept is core to understanding why agile framework works and things necessary in order to accomplish adaptive planning. Most of this is inspired and taken from the talks of Martin Fowler.
Contraction of muscles takes place with relativity between Actin and Myosin Filaments. Here, Ach. regards to acetylchloine. Interaction between Actin and myosin will bring contraction in muscle.
A complete lecture of the Histology of Muscle Tissues, taught at First Moscow State Medical University, Moscow, in the Histology department, for the first year English medium foreign medical students.
Cartilage is a connective tissue structure that is composed of a collagen and proteoglycan-rich matrix and a single cell type: the chondrocyte. Cartilage is unique among connective tissues in that it lacks blood vessels and nerves and receives its nutrition solely by diffusion
I presented these slides to create awareness about adaptive planning and rationale behind it. This concept is core to understanding why agile framework works and things necessary in order to accomplish adaptive planning. Most of this is inspired and taken from the talks of Martin Fowler.
There's a big shift in both at the architecture and api level from Hadoop 1 vs Hadoop 2, particularly YARN and we had our first meetup to talk about this (http://www.meetup.com/Atlanta-YARN-User-Group/) on 10/13/2013.
This presentation offers users a simple guide to learning the basic structure of hedge funds. Guiding users through hedge fund structures, covering topics such as:
• Hedge funds’ typical partnership structure
• Organizational structure at many hedge funds
• Due to their structure, only certain types of investors can invest with hedge funds
• The role of portfolio managers
• The typical role of general counsels, auditors, and administrators at hedge funds
• How prime brokers interact with hedge funds
• Executing brokers and their role in the hedge fund industry
• Fee structure at hedge funds
Learn more about the global hedge fund industry at: www.hedgefundfundamentals.com.
Epithelium cellstissues histology
1. Chapter 4 Tissues and Histology • Tissues - collections of similar cells and the substances surrounding them • Tissue classification based on structure of cells, composition of noncellular extracellular matrix, and cell function • Major types of adult tissues – Epithelial – Connective – Muscle – Nervous • Histology: Microscopic Study of Tissues – Biopsy: removal of tissues for diagnostic purposes – Autopsy: examination of organs of a dead body to determine cause of death
Tissue Definition
Tissues are groups of cells that have a similar structure and act together to perform a specific function. The word tissue comes from a form of an old French verb meaning “to weave”. There are four different types of tissues in animals: connective, muscle, nervous, and epithelial. In plants, tissues are divided into three types: vascular, ground, and epidermal. Groups of tissues make up organs in the body such as the brain and heart.
Types of Animal Tissues
Connective
Connective tissue connects or separates groups of other tissues. It is found in between all the other tissues and organs in the body. Connective tissue is made up of cells and ground substance, which is a gel that surrounds cells. Most connective tissue, except for lymph and blood, also contains fibers, which are long, narrow proteins. Fibers can be collagenous, which bind bones to tissues; elastic, which allow organs like the lungs to move; or reticular, which provide physical support to cells. Connective tissue also allows oxygen to diffuse from blood vessels into cells.
About 1 in 10 people are have a disorder involving connective tissue. Some connective tissue disorders include sarcomas, Marfan syndrome, lupus, and scurvy, which is a Vitamin C deficiency that leads to fragile connective tissue.
Muscle
Muscle tissue comprises all the muscles in the body, and the specialized nature of the tissue is what allows muscles to contract. There are three types of muscle tissue: skeletal muscle, cardiac muscle, and smooth muscle. Skeletal muscle anchors tendons to bones and allows the body to move. Cardiac muscle is found in the heart and contracts to pump blood. Smooth muscle is found in the intestines, where it helps move food through the digestive tract, and it is also found in other organs like blood vessels, the uterus, and the bladder. Skeletal and cardiac muscles are striated; this means that they contain sarcomeres (a unit of muscle tissue) that are arranged in a uniform pattern. Smooth muscle does not have sarcomeres.
Duchenne muscular dystrophy is an example of a muscle tissue disorder. It is an inherited disorder that causes muscles to atrophy over time. The muscles shorten as they atrophy, which can cause scoliosis and immobile joints. Individuals with the disorder are usually male because the gene responsible for it is found on the X chromosome (of which males have only one).
Nervous
Nervous tissue is found in the brain, spinal cord, and peripheral nerves, which are all parts of the nervous system. It is made up of neurons, which are nerve cells, and neuroglia, which are cells that help nerve impulses travel. Nervous tissue is grouped into four types: gray matter and white matter in the brain, and nerves and ganglia in the peripheral nervous system. The main difference between gray and white matter is that axons of the neurons in gray matter are unmyelinated, while white matter is myelinated. Myelin is a white, fatty substance that insulates neurons and
i. The glycogen synthase can add glucose units only in
alpha-1, 4 linkage. A branching enzyme is needed to
create the alpha-1, 6 linkages.
ii. When the chain is lengthened to 11–12 glucose
residues, the branching enzyme will transfer a block
of 6 to 8 glucose residues from this chain to another
site on the growing molecule. The enzyme amylo-
[1, 4]→[1, 6]-transglucosidase (branching enzyme)
forms this alpha-1, 6 linkage. (Fig. 10.4).
iii. To this newly created branch, further glucose units can
be added in alpha-1, 4 linkage by glycogen synthase.i. The glycogen synthase can add glucose units only in
alpha-1, 4 linkage. A branching enzyme is needed to
create the alpha-1, 6 linkages.
ii. When the chain is lengthened to 11–12 glucose
residues, the branching enzyme will transfer a block
of 6 to 8 glucose residues from this chain to another
site on the growing molecule. The enzyme amylo-
[1, 4]→[1, 6]-transglucosidase (branching enzyme)
forms this alpha-1, 6 linkage. (Fig. 10.4).
iii. To this newly created branch, further glucose units can
be added in alpha-1, 4 linkage by glycogen synthase.i. The glycogen synthase can add glucose units only in
alpha-1, 4 linkage. A branching enzyme is needed to
create the alpha-1, 6 linkages.
ii. When the chain is lengthened to 11–12 glucose
residues, the branching enzyme will transfer a block
of 6 to 8 glucose residues from this chain to another
site on the growing molecule. The enzyme amylo-
[1, 4]→[1, 6]-transglucosidase (branching enzyme)
forms this alpha-1, 6 linkage. (Fig. 10.4).
iii. To this newly created branch, further glucose units can
be added in alpha-1, 4 linkage by glycogen synthase.i. The glycogen synthase can add glucose units only in
alpha-1, 4 linkage. A branching enzyme is needed to
create the alpha-1, 6 linkages.
ii. When the chain is lengthened to 11–12 glucose
residues, the branching enzyme will transfer a block
of 6 to 8 glucose residues from this chain to another
site on the growing molecule. The enzyme amylo-
[1, 4]→[1, 6]-transglucosidase (branching enzyme)
forms this alpha-1, 6 linkage. (Fig. 10.4).
iii. To this newly created branch, further glucose units can
be added in alpha-1, 4 linkage by glycogen synthase.i. The glycogen synthase can add glucose units only in
alpha-1, 4 linkage. A branching enzyme is needed to
create the alpha-1, 6 linkages.
ii. When the chain is lengthened to 11–12 glucose
residues, the branching enzyme will transfer a block
of 6 to 8 glucose residues from this chain to another
site on the growing molecule. The enzyme amylo-
[1, 4]→[1, 6]-transglucosidase (branching enzyme)
forms this alpha-1, 6 linkage. (Fig. 10.4).
iii. To this newly created branch, further glucose units can
be added in alpha-1, 4 linkage by glycogen synthase.Vi. The glycogen synthase can add glucose units only in
alpha-1, 4 linkage. A branching enzyme is needed to
create the alpha-1, 6 linkages.
ii. When the chain is lengthened to 11–12 glucose
residues, the branching enzyme will transfer a block
of
introduction to tissues-human body is made up of 4 basic tissues- connective tissues, epithelium tissue, nervous tissue, muscular tissue--biological tissues is a collection of interconnected cells that perform a similar function and an embryological origin with similar structure , types of tissues , microscopic diagram, diagrams of tissues, epithelial tissue and types, connective tissue , its components and types
Types of tissues with characteristic's and distribution regions
1. Biology 101 Laboratory September 2009
EXERCISE VI
HISTOLOGY
Tissue 4 Major Types of Tissues
• group or aggregation of cells 1. Epithelial Tissues
• display common functional or morphological 2. Connective Tissues
properties or both 3. Muscular Tissues
4. Nervous Tissues
Histology
• study of microstructure of tissues
I. EPITHELIAL TISSUES
Covers external surfaces of the body or lines cavities
Lacks vascular supply but are nourished by diffusion from capillary beds in the underlying CT
Derived from the three embryonic layers
For protection; secretion, absorption, lubrication & sensory perception
Basal membrane/Basal lamina – thin membrane that bounds the epithelial tissues to the underlying
connective tissues
According to Shape: According to Number of Cell Layers:
1. Squamous 1. Simple
2. Cuboidal 2. Stratified
3. Columnar 3. Pseudostratified
4. Transitional
Epithelium
Simple Squamous Epithelium
Source: inner lining of cheek
Epithelium
Simple Cuboidal Epithelium
Source: kidney tubules
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2. Biology 101 Laboratory September 2009
Simple Columnar Epithelium
Source: stomach or small intestine
• highly absorptive surfaces → small intestine
• secretory surfaces → stomach
• may be specialized for secretion → goblet cells in the small intestine
Stratified Squamous Epithelium
Source: skin
• Composed of epithelial tissues with more cell layers
• Only cells of the lowest layer touch the basement membrane
• Basal layer consists of columnar or cuboidal cells → undergoes continuous mitotic division
• Cells near the surface are flattened, consists of squamous cells
Pseudostratified Ciliated Columnar Epithelium
Source: trachea
• ‘pseudo’ → false
• Cells appear to be arranged in more than one
layer but all of them are attached to the basal
membrane, thus are actually single layer of cells
• Pointed structure: microvilli (hair-like
structures)
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3. Biology 101 Laboratory September 2009
Transitional Epithelium
Source: urinary bladder
• Transition between stratified squamous & columnar epithelium
• Cells change their form
• Found in hollow organs subject to contraction & stretching
II. CONNECTIVE TISSUES
Bind, anchor, and support body parts
Abundant cellular matrix
Originate from the mesenchyme, the embryonic connective tissue that develops from the mesoderm
2 Types:
1. Connective Tissue Proper – for binding organs
2. Specialized Connective Tissues – binding & other specific functions
Connective tissue fibers:
1. Collagen fibers – thick, un-branched, appear wavy; show resistance to stretching
2. Elastic Fibers – thin & less wavy than collagen fibers, branched; easily stretched but return to
normal length when tension is released
3. Reticular Fibers – extremely fine & highly branched forming network
Connective Tissue Proper
Loose or Areolar Connective Tissue Dense Connective Tissue (Tendon)
• Large amount of tissue fluid, many cells, few • More fibers, less ground substance & cells
fibers
cmcremen 3
4. Biology 101 Laboratory September 2009
Connective Tissue:
Specialized Connective Tissue:
Adipose Tissue
• Store fats in the form of triglycerides
• Stores nutrients, provides insulation, & acts as cushion; fills
crevices in organs
• Adipocytes → fat cells
Cartilage
• Soft & pliable 3 Types of Cartilage based on Matrices:
• Chondrocytes → cartilage cells 1. Hyaline Cartilage
2. Elastic Cartilage
• Lacuna → cartilage matrix
3. Fibrocartilage
• The lacuna houses the chondrocytes
Hyaline Cartilage:
Source: trachea • Clear homogenous matrix
• Perichondrium → dense connective tissue at the periphery
of the cartilage
• Spindle-shaped lacunae
Elastic Cartilage Fibrocartilage
Source: epiglottis & external ear • Resembles connective tissue proper
• Contains collagen fibers, & a network of elastic • Consists of a network of collagen fibers
fibers • Lacunae → round or oval
cmcremen 4
5. Biology 101 Laboratory September 2009
Specialized Connective Tissue (continuation)
Bone
For support, protection, movement, forming blood cells;
reservoir of calcium
Lamellae → matrix
Haversian canal
Osteocytes → bone cells
Lacunae
Canaliculi → minute canals radiating from the lacunae
Haversian System or Osteone – composed of haversian canal,
lamellae, osteocytes, lacunae, & canaliculi
Volkman’s canal – canals that runs diagonally/right angles to
the Haversian canal
Blood
Transport medium
Consists of cells, matrix, & intercellular fibers
Cellular elements: erythrocytes, leucocytes, & thrombocytes
Matrix: liquid called plasma
Function: transporting gases & substances to and from the different parts of the body
1. Erythrocytes or Red Blood Cells
Oxygen carrier
carries hemoglobin
2. Leucocytes or White Blood Cells
For body defense against microorganisms by their phagocytic action & antibody production
a. Granular WBC
♦ have a granulated cytoplasm & multi-lobulated nucleus connected by chromatin strands
♦ function as phagocytes
b. Agranular WBC
♦ cells without granules in the cytoplasm
♦ are transformed into large phagocytic cells called macrophages
3. Platelets
also, thrombocytes
small, non-nucleated, colorless, round or oval, non-motile corpuscles
functionally related to blood clotting
Human RBC Frog’s RBC
Granulated WBC Agranulated WBC
cmcremen 5
6. Biology 101 Laboratory September 2009
III. MUSCLE TISSUES
• specialized for contraction
• contains contractile proteins – allows them to shorten their lengths
• muscle cells → muscle fibers
• 3 Types of Muscle Tissues:
1. Skeletal muscle
2. Smooth muscle
3. Cardiac muscle
Skeletal Muscle
• connected to the skeleton
• concerned with body movement
• striated; voluntary in action
• skeletal muscle cells: cylindrical, striated & multinucleated; oval nuclei are at the periphery of the cell
• Fasciculi – muscle fibers grouped into bundles
• Endomysium – connective tissue meshwork enveloping the muscle fiber
• Perimysium – connective tissue sheath joining the fasciculi
• Epimysium – holds together the whole muscle mass
Smooth Muscle
• found as part of the walls of the viscera (internal organs)
• non-striated; involuntary in action
• smooth muscle cell: spindle-shaped cells in side view with
a single centrally located nucleus at the widest part of the
cell
• cytoplasm is homogenous
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7. Biology 101 Laboratory September 2009
Cardiac Muscle
• comprises the contractile wall of the heart; also found in the roots of large blood vessels arising from the
heart
• specialized to contract automatically & rhythmically
• striated, branched; involuntary in action
• presence of intercalated discs → dark bands
IV. NERVOUS TISSUES
• specialized to receive stimuli from the environment or from the various organs of the body
• transmit impulses to the nerve centers in the brain & spinal cord
• composed of 2 Types of Cells: Neurons & Neurologia
Neuron
• consist of nerve cell body → soma or perikaryon 2 processes (nerve fibers): 1 axon & 1 dendrite
perikaryon
aryon;
1. axon
thinner & longer compared to the dendrite, branches extensively
gradually decreases in diameter as it furthers the cell body
conveys impulses away from the cell body
2. dendrite
short & confined near the cell body
may be more than one process in a neuron
have thorny appearance
conveys impulses towards the cell body
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8. Biology 101 Laboratory September 2009
• Types of Neurons (based on Processes)
a. Multipolar Neuron – 1 axon & several dendrites
b. Bipolar Neuron – 1 axon & 1 dendrite; least numerous
c. Unipolar Neuron – 1 process that separate into an axon & a dendrite
Teased Nerve:
Myelin Sheath – appears as a tube surrounding the axis cylinder
(cytoplasm of the axon); produced by Schwann cells
Nodes of Ranvier – regions in the myelin sheath that appears
interrupted
Neurologia
• supporting cells of the neurons
• possess several branching processes
Cross Section of Nerve:
Fascicle → single discrete bundle of nerve fibers & connective tissue
Epineurium → connective tissue that binds several fascicles in nerve trunks
Perineurium → dense connective tissue covering each fascicle
Endoneurium → covers individual nerve fibers
cmcremen 8