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Histology(MLHS-201)
Lecture 3
Tissue types
Dr. Afaf Mousaad• Department of Medical Laboratory Technology• Faculty of Allied Medical Sciences
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Learning objectives:
• Be able to classify epithelial tissues.
• Be able to correlate different types of epithelia
to their functions.
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The four tissue types are:– Epithelial tissue– Connective tissue– Muscular tissue– Nervous tissue
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•Epithelial tissue is made up of cells closely packed .
•The epithelial cells lie on the basement membrane .
•Avascular tissue .
•Replaces lost cells by cell division.
Epithelial Tissue:
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Functions of Epithelial Tissue
1.Protection: Epithelial tissue protects the
underlying tissues .
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2.Absorption: e.g. epithelial cells in the
small intestine .
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3.Secretion:
Epithelial cells of glands are
secretory cells.
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e.g. Olfactory mucosa.
A modified epithelium
containing specialized
sensory receptor cells .
4. Sensory:
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Classification of epithelia
• Number of cell layers– Simple– Stratified
• Shape of apical surface cells– Squamous– Cuboidal– Columnar
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1-Simple epithelium
a.Simple squamous epithelium
Example1. Bowman,s capsule
Classification of epithelial tissues:
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Example 3. The lung alveoli
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2. Simple cuboidal epithelium
kidney tubules
thyroid follicles
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1-Simple epithelium
3. Simple columnar epithelium:
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4.Pseudostratified ciliatedColumnar Epithelium
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Questions1.list the main types of tissues? • Epithelial tissue • Connective tissue • Muscle tissue • Nervous tissue 2.Which type of epithelia lining the abdominal cavity?Mesotheium3. Which type of epithelia is the stomach lining?Columnar epithelium4. Which type of epithelia consists of fried egg shaped
cells?Squamous epithelium
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5.Where do you find epithelial tissues in human body?
• skin • the lining of the mouth • the lining of blood vessels • lung alveoli • kidney tubules ,…
04/21/23
AssignmentsAssignment tittles األسم I.D م
Cell membrane
احمد حسن علي
ابراهيم حميدة51012009 1
احمد حسين احمد رسالن 51012010 2
احمد سعيد فرغلي أحمد 51012011 3
احمد شيخون محفوظ
محمد51012012 4
احمد محمد احمد عبد
العال 51012014 5
احمد محمد فوزي عبد
العظيم51012015 6
اخالص حمدي محمد
خليل51012016 7
اسراء علي محمود علي
فرحات51012017 8
Hypervitaminosis
عبد محمود صبحى فاطمه
الرحيم 51012101 1
السالم عبد محمد فاطمة
خليل محمد51012102 2
السعيد ابراهيم كريم
زيدان احمد51012103 3
عبد خليفه احمد كريم
المطلب51012104 4
عبد السالم عبد خالد كريم
المجيد51012105 5
هاشم احمد محمد كريم 51012106 6
قدوس ميالد ماريان
شنودة51012107 7
ابراهيم ابراهيم محمد
الهادي عبد51012108 8