1. Tissue Structure and Function
BIOL2101
Lab 4A

2. Tissue
An aggregation of cells and cell products of similar structure and embryonic origin that perform a common function

3. The study of tissues, especially their structure and arrangement
Histology
The study of tissues, especially their structure and arrangement

4. Basic Tissue Types
Epithelial
Connective
Muscle
Nervous

5. An aggregation of tissues organized into a functional unit

6. Organs working together as functional units
System
Organs working together as functional units

7. 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

8. 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

9. Figure 09.9a

10. Figure 09.9b

12. Pseudostratified Columnar

13. Epithelial Types Stratified Epithelium Stratified squamous - skin
Transitional – urinary tract and bladder

15. Connective Tissue Tissue that connects Loose connective tissue
adipose (fat)
Dense connective tissue
cartilage
Bone
Vascular tissue
Erythrocytes: Red Blood Cells – carry oxygen
Leucocytes: White Blood Cells – part of the immune system
Platelets - clotting

17. Adipose

18. Figure 09.11c

19. Figure 09.11d

20. Fluid Connective Tissue

21. Erythrocytes:
Red Blood Cells

22. Leucocytes: White Blood Cells

23. Platelets

24. End of 4A