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Dense Connective
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Can be regular, irregular, or elastic
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Regular:
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Primarily parallel collagen fibers, few elastic
fibers, major cell type is fibroblast
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Attaches muscles to bones or to other
muscles; attaches bones to bones;
withstands great tensile stress when
pulling force is applied in one direction
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Located in tendons, ligaments,
aponeuroses
Irregular
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Primarily irregularly arranges collagen
fibers, some elastic but mostly fibroblasts
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Withstands tension exerted in many
directions; provides structural strength
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Located in fibrous capsules of organs and
of joints, dermis of skin, submucosa of
digestive tract
• Dense
Irregular
• Dense
Regular
(Dense) Elastic Connective
• Contains a high proportion
of elastic fibers
• Allows tissue to recoil after
stretching; maintains
pulsatile flow of blood
through arteries; aids
passive recoil of lungs
following inspiration
• Located in walls of large
arteries, withing ligaments
associated w/ vertebral
column, and within the
walls of the bronchial tubes
Cartilage
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Can be hyaline, elastic, or fibrocartilage
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Hyaline:
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Amorphous but firm matrix; collagen fibers form an
imperceptible network; chondoblasts produce the matrix
and when mature chondrocytes lie in lacunae
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Supports and reinforces; resilient cushion; resists
compressive stress
Located in embryonic skeleton, covers ends of long bones in
joints, forms costal cartilages in ribs, cartilage in nose,
trachea and larynx
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Elastic:
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Hyaline
Like hyaline but with more elastic fibers in matrix
Maintains the shape of a structure while allowing great
flexibility
Supports external ear and epiglottis
Fibrocartilage:
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Matrix similar to (less firm) hyaline; many thick collagen
fibers predominate
Tensile strength allows it to absorb compressive shock
Located in intervertebral disks, pubic symphysis, knee joints
Elastic
Fibrocartilage
Bone (Osseous) Cells
• Can be compact or spongy
bone
• Hard, calcifies matrix
containing many collagen
fibers; osteocytes lie in
lacunae; well-vascularized
• Supports and protects;
provides levers for the
muscles to act on; stores
calcium, minerals, fat;
marrow inside bones is site
for blood cell formation
(hematopoiesis)
• Located in bones
Blood (RBCs and WBCs)
• Red and white blood
cells in a fluid matrix of
plasma
• Transports respiratory
gases, nutrients,
wastes, and other
substances
• Contained in blood
vessels
Neural/Nervous Tissue
• Nervous systems are composed of nerve
cells/neurons and glia (support cells).
• Neurons are organized into informationprocessing neural networks
• The nervous system regulates and controls
body functions; they respond to stimuli and
transmit electrical impulses over substantial
distances within the body.
Neuron
• Neurons are branching cells;
cell processes may be quite
long extend from the
nucleus-containing body
• Neurons transmit electrical
signals from sensory
receptors and to effectors
which control their activity;
support cells support and
protect neurons
• Located in brain, spinal
cord, and nerves
Brain Tissue
• Spinal Cord
• Brain
Reproductive Tissue
• Organs secrete a variety of hormones,
especially active during puberty, which play a
vital roles in development and function of the
sex organs and other organs in the body.
• Purpose is to produce fertile offspring.
Spermatogonium
• Stem cell for sperm
• Spermatocytes divide
by mitosis until
puberty, then all
daughter cells become
spermatogonia.
Developing Follicle
• The maturation of the follicle is part of the ovarian
cycle
• Process begins in ovaries and ends in ovulation
Web Sites and Texts
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http://www.stegen.k12.mo.us/tchrpges/sghs/ksulkowski../images/simplecub.jpg
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http://www.histology.leeds.ac.uk/tissue_types/connective/connective_tissue_types.php
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http://www.meddean.luc.edu/lumen/meded/Histo/frames/h_frame7.html
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http://www.lab.anhb.uwa.edu.au/mb140/corepages/connective/connect.htm#reticular
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http://biology.clc.uc.edu/fankhauser/Labs/Anatomy_%26_Physiology/A%26P201/Connective_Tissues/C
artilage.htm
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http://www.siumed.edu/~dking2/intro/bldcells.htm
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http://www.lab.anhb.uwa.edu.au/mb140/corepages/nervous/nervous.htm#labcord
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http://www.webpathology.com/image.asp?case=27&n=2
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My AP Bio textbook: Principles of Life
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My Anatomy/Physiology textbook: Human Anatomy & Physiology