KIN 216 Lecture Notes - Lecture 5: Epithelium, Goblet Cell, Mucin
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KIN 216
Outline of Tissue Types
Epithelial tissue
A. Membranous
i. Simple
1. Simple squamous
2. Simple cuboidal
3. Simple columnar
4. Pseudostratified columnar
ii. Stratified
1. Stratified squamous
2. Stratified cuboidal
3. Stratified columnar
4. Transitional
B. Glandular
iii. Exocrine (local activity)
1. Unicellular
a. Goblet cell: Epithelial lining of intestines, respiratory tubes, between columnar
cells; Produce mucin: glycoprotein that dissolves in water = product of mucin and
water is mucus
2. Multicellular
a. 2 parts: duct and secretory unit
b. Classified by duct structure:
i. Simple: unbranched duct; (simple branched exist)
ii. Compound: branches
iii. Secretory unit: tubular (unit forms tubes) or alveolar (spherical sacs) –
tubuloalveolar also exist (contain both tubular and alveolar units
iv. Endocrine
a. Ductless; secrete into tissue fluid, go throughout body, produce hormones
II. Connective tissue
A. Embryonic
*Undifferentiated
*Primarily in embryo
CT proper
i. Loose
1. Areolar
a. Location: hypodermis, fascia, surrounding nerves, blood vessels
b. Structure: loosely arranged fibers, widely spaced cells, has all 3 protein fiber types;
lots of open spaces with no cells or fibers
c. Function: cushioning, support and binding, defense against infection, nourishment
of surrounding tissue- also repair of damaged tissue
d. Good blood supply; highly vascular
e. Cells are mostly fibroblasts (produce protein fibers), some mast cells: react to
injury- produce heparin, which is anticoagulant- also produce histamine, which is
vasodilator
f. Common organelle: lysosomes- many macrophages: engage in phagocytosis, eat
damaged cells
2. Adipose