Today - Histology
• 1 handout today
• Quiz #1 available today
at 3pm until Monday at
11pm
• Quiz #1 available Friday 3pm
until Monday at 11pm
• 10 minutes, 5 questions
• 1 question = 1 point
• you can only take it once
• don’t open it until you are
ready to take it!
• be sure to hit submit when
you are finished
• submit before time runs out
• open book but not a group
effort!
Epithelial tissue
Connective tissue
Cells + matrix = tissues
1.
2.
3.
4.
Epithelial tissue
Connective tissue
Muscle tissue
Nervous tissue
simple
stratified
squamous
cuboidal
columnar
Goblet cells
ciliated
Pseudostratified columnar
Stratified squamous
Transitional (stratified)
Simple or stratified
• Squamous
• Cuboidal
• Columnar
• Pseudocolumnar
• Glands?
1. esophagus
2. stomach
3. Small intestine
4. Large intestine
5. rectum
1. Esophagus: food passageway
2. Stomach: mechanical & chemical
breakdown of food
3. Small Intestine: absorption & secretion
4. Large intestine: some absorption
5. Rectum: passageway for waste
Connective Tissue
Three types
• Fibrous
• Supportive
• Fluid
General Functions:
1. Binds organs
2. Support
3. Protection
4. Immune protection
5. Movement
6. Storage
7. Heat
8. Others…..
Cells + fibers + ground substance = connective tissue
Cells = fibroblasts
Fibers = elastin & collagen
Reticular fibers
Cells = fibroblasts
Fibers = collagen & elastin
Change composition = change function
loose
dense
regular
mesentery
Tendons & ligaments
irregular
Areolar tissue
skin
Fibrous connective tissue type and function
Supportive connective tissue = cartilage & bone
Cells: chondrocytes
Fibers: collagen & elastin
GS: GAG’s
Perichondrium: dense, irregular CT with chondroblasts
hyaline
elastic
fibrocartilage
• chondrocytes
• collagen & elastin fibers
• GAG’s
Bone
Cells: osteocytes
Fibers: collagen
Matrix: GAG’s & minerals
Central canal = blood vessel
Surrounded by periosteum
Nervous tissue
• neurons & glia
• electrical & chemical signals
Muscle tissue
• muscle fibers
• contract when stimulated
• skeletal, smooth & cardiac
Glands = cell or organ that secretes something
Exocrine glands
• secrete stuff to surface
• body surface or organ
• sweat, tear, mammary, goblet cell
Endocrine glands
• secrete stuff into blood
• stuff = hormones
Membranes line & cover viscera
• cutaneous
• mucous
• serous
Mucous membrane
Differentiation
Metaplasia
** don’t forget about quiz #1!
Available until Monday at 11pm