Powerpoint of human body tissue groups

1. Human Tissues
Tissue Differentiation
Anatomy and Physiology 1
A. DeVault

2. Tissue Defined
•Tissues are a group of cells that have a
similar shape and purpose.
•Tissues become organs that become
organ systems.
•Tissues begin to form as embryonic
stem cells.

4. Tissue Types
•Epithelial
•Connective
•Muscle
•Nervous

5. Epithelial Tissue
3 types of epithelial tissue
•Squamous
•Cuboidal
•Columnar
Descriptive layers
Simple – one layer
Stratified – more than one layer

6. Characteristics of Epithelium
• Polar surfaces
• Apical free surface
• Basement membrane
Avascular
Pronounced nucleus
Mitotic activity
Closely packed together
Identifies by number of cells and shape of cell

7. Epithelial Cell Shapes

8. Simple Squamous Epithelia

9. Simple Cuboidal Epithelia

10. Simple Columnar Epithelia

11. Stratified Squamous Epithelia

12. Pseudostratified ciliated columnar
epithelia

13. Glandular Epithelial
•A gland is one or more cells that produce and
secrete a specific product.
•The product is always a water-based fluid
(aqueous) and usually contains proteins (the
product is referred to as a secretion).
•Secretion is considered an active process.

14. Glands are Classified
• Endocrine
• Endocrine glands are
also called ductless
glands because
eventually, they lose
their ducts.
• They produce hormones
(chemical messengers )
and secrete them
directly into the
bloodstream.
• Exocrine
• Exocrine glands secrete
their products onto the
skin or into body
cavities.
• Products secreted by
exocrine glands include
sweat, oil, mucous, bile,
and milk*.

16. Modes of Secretion
•Merocrine glands– secrete their products by
exocytosis during production (the pancreas and
most mucus/salivary glands belong to this class).
• Apocrine: sweat gland
•Holocrine glands– accumulate their products
until they rupture and die.
• Holocrine glands secrete dead cell fragments
along with their main product. (oil glands)

17. Glandular Epithelial

18. Connective Tissue

19. Characteristics of Connective Tissue
•Connective tissue supports and binds other
tissues of the body.
•All connective tissue apart
from blood and lymph consists of three main
components:
•fibers (elastic and collagenous fibers),
• ground substance and cells.
• The cells of connective tissue
include fibroblasts, adipocytes, macrophages, mast
cells and leucocytes.

20. Connective Tissue
6 Types
• Loose connective tissue
• Dense connective tissue
• Adipose
• Blood
• Cartilage
• Bone

21. Loose Connective Tissue

22. Areolar C.T.

23. Dense Connective Tissue

24. Fibrous C.T.

25. Adipose Tissue

27. Blood

28. Blood smear

29. Cartilage

30. Cartilage types
•Hyaline
•Elastic
•Fibrocartilage

31. Hyaline

32. Elastic

33. Fibrous

35. Bone

36. Muscle Tissue
3 types of muscle tissue
•Cardiac –heart
•Skeletal – attached to bones
•Smooth – internal organs and blood vessels

37. Cardiac Muscle

38. Skeletal Muscle

39. Smooth Muscle

40. Nerve Tissue