Tissue Structure and Function
Chapter 9 in Textbook
Chapter 4 in Lab Book
Tissue
An aggregation of cells and cell products
of similar structure and embryonic origin
that perform a common function
Histology
The study of tissues, especially their
structure and arrangement
Basic Tissue Types
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Epithelial
Connective
Muscle
Nervous
Organ
An aggregation of tissues organized into
a functional unit
System
Organs working together as functional
units
Epithelial Tissue
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Sheet-like layer of cells
Cover surfaces or line cavities
Often has glandular cells for fluid secretion
Endothelium
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Epithelium that lines heart, blood vessels and
lymphatic vessels
Epithelial Types
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Simple Epithelium
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Simple squamous – inside blood vessels
Simple cuboidal – lines ducts, ex. Kidney
tubules, mucous glands
Simple columnar – lining of small intestine
Pseudostratified Columnar – trachea, bronchi
Figure 09.9a
Figure 09.9b
Pseudostratified Columnar
Epithelial Types
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Stratified Epithelium
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Stratified squamous - skin
Transitional – urinary tract and bladder
Connective Tissue
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Tissue that connects
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Loose connective tissue
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Dense connective tissue
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adipose (fat)
cartilage
Bone
Vascular tissue
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Erythrocytes: Red Blood Cells – carry oxygen
Leucocytes: White Blood Cells – part of the immune system
Platelets - clotting
Adipose
Figure 09.11c
Figure 09.11d
Erythrocytes:
Red Blood Cells
Leucocytes: White Blood Cells
Platelets
Muscle Tissue Types
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Smooth Muscle (=Involuntary Muscle)
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Skeletal Muscel (=Voluntary Muscle)
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Ex. Small intestine
Ex. Large muscles of body
Cardiac Muscle
Skeletal
Smooth
Cardiac
Nervous Tissue
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Includes Nerves, Spinal Cord, Brain
Cells are called neurons
Neuron