1. Tissues of the Body

4. From Cells to Organ Systems
Cells combine to form tissues, and tissues combine to form organs
Cells combine to form four primary tissues
Epithelial tissue
Connective tissue
Muscle tissue
Nervous tissue

5. Epithelium Two types: membranous epithelia glandular epithelia
form the coverings or linings of organs
glandular epithelia
form exocrine and endocrine glands

6. Epithelial Tissue

7. Epithelial Tissue

8. Epithelium-Human Stomach

10. Glandular Epithelia
Epithelial tissues illustrate a basic biological principle: that structure closely correlates with function

11. Figure 4.4

12. Connective Tissue Binds the cells and organs of the body together
Section 4-1
Binds the cells and organs of the body together
All connective tissues consist of two basic components: cells and extracellular fibers
Two types of connective tissue are:
Connective tissue proper
Specialized connective tissue

13. Connective Tissue

14. Connective Tissue

15. Connective Tissue An important structural component of organs
Consists of two types:
Dense connective tissue
Loose connective tissue

16. Connective Tissue

17. Specialized Connective Tissues
Perform specific functions essential to homeostasis
The body contains three types of specialized connective tissue:
Cartilage
Bone
Blood

18. Cartilage
Consists of specialized cells embedded in a matrix of extracellular fibers and other extracellular material
Blood
Contains blood cells, platelets, plasma

19. Osseous Tissue
Bone
Consists of bone cells (osteocytes) and a calcified cartilage matrix
Two types of bone tissue exist: spongy and compact

20. Osseous Tissue

21. Muscle Tissue
Consists of specialized cells that contract when stimulated
The body has three types of muscle tissue:
Skeletal (voluntary)
Cardiac (involuntary)
Smooth muscle (involuntary)

22. Muscle Tissue

23. Muscle Tissue

24. Nervous Tissue Contains specialized cells that conduct impulses
Conducting cells, called neurons, transmit impulses from one region of the body to another.
Nonconducting cells, neuroglia, are a type of nervous system connective tissue.

25. Nerve Tissue

26. Nerve Tissue

27. Organ Systems Tissues combine to form organs.
Organs are discrete structures that have evolved to perform specific functions
Most organs do not function alone, they are part of a group of cooperative organs, called an organ system.

30. Let’s go to the Video
Body Tissues