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Unformatted text preview: ck absorption and insulation Many organs including the heart,
eyes, kidneys, and spleen. Dense regular Arranged in an irregular pattern Provides strength and withstands
stress. Deep layers of the skin’s dermis, GI
tract, capsules of synovial joints. Dense irregular Almost entirely collagen fibers, densely
packed Strongest connective tissue Tendons, ligaments, aponeuroses,
fascia, fibrous joints Reticular Delicate fibers forming interlacing
networks Internal support Kidneys, spleen, liver and other soft
(hyaline, elastic, fibrocartilage) Avascular, gel like Cushioning, and joint lubrication Hyaline-nose, ribs, articular cartilage.
Elastic- epiglottis and ear
Fibrocartilage- intervertebral disks and
the symphysis pubis The Skin
Match the number of
each structure in the
skin diagram with its
name on the chart, then
functions of each. The
first one has been done
as an example. Number
Reticular layer of
Sebaceous gland 3 Hair root 4 Hypodermis (as well
as adipose tissue)
Dermal papillae 5 Meissner’s
Eccrine glands 7 Arrector pili muscle 9 Pacinian corpuscle 10 6 8 Characteristics
The outer layer of the skin, composed of stratified squamous epithelium
Made of areolar and dense irregular connective tissue. Contains many of the
nerves, sensory corpuscles, hair follicles, and numerous glands.
Secrete oily substance called sebum which prevents dehydration. They connect to
hair follicles over most of the skin
Anchors hair, area of new hair cell growth
The hypodermis is mostly made up of adipocytes. It is also called the subcutaneous
Extension of dermis into epidermis. Contain vascular loops and specialized nerve
Light touch receptors that are attached to nerve endings that produce action
Found extensively in skin and aids in thermoregulation. It secretes primarily water
with little amounts of salts and urea.
Found in dermis and attached at one end to the hair root and the other end to
basement membrane of epidermis. Able to raise hairs during thermoregulation and
Responds to pressure and vibration. Found in subcutaneous tissue as well as
mesenteries and near joints.
Case History 1 A 27 year old man, who works outdoors, notices a growth on the skin which includes a darkly pigmented spot surrounded by a halo of inflamed skin. This man
has a very fair complexion, with numerous freckles and blond hair. Because of his job and recreational interests he spends a great deal of time outdoors and
often gets sunburned in the summer time.
The pigmented spot was removed surgically and sent for biopsy. It was determined to be malignant, but there was no evidence of metastasis.
5. What is the most likely diagnosis of the condition described. Explain.
Describe the normal histology of the epidermis which relates to this condition.
Where do melanocytes originate, and where do they reside after migration.
Describe the differences in metabol...
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This note was uploaded on 01/29/2013 for the course BIOL 239 taught by Professor Swan during the Fall '12 term at New Mexico.
- Fall '12