Tissue Structure and Function

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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




Epithelial
Connective
Muscle
Nervous
Organ
An aggregation of tissues organized into
a functional unit
System
Organs working together as functional
units
Epithelial Tissue




Sheet-like layer of cells
Cover surfaces or line cavities
Often has glandular cells for fluid secretion
Endothelium

Epithelium that lines heart, blood vessels and
lymphatic vessels
Epithelial Types

Simple Epithelium




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

Stratified Epithelium


Stratified squamous - skin
Transitional – urinary tract and bladder
Connective Tissue

Tissue that connects

Loose connective tissue


Dense connective tissue



adipose (fat)
cartilage
Bone
Vascular tissue



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

Smooth Muscle (=Involuntary Muscle)


Skeletal Muscel (=Voluntary Muscle)


Ex. Small intestine
Ex. Large muscles of body
Cardiac Muscle
Skeletal
Smooth
Cardiac
Nervous Tissue


Includes Nerves, Spinal Cord, Brain
Cells are called neurons
Neuron
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