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Tissues of the Body

Tissues of the Body. Cells combine to form tissues, and tissues combine to form organs. There are four primary types of tissues –Epithelial tissue –Connective

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Tissues of the Body

•Cells combine to form tissues, and tissues combine to form organs.

•There are four primary types of tissues– Epithelial tissue– Connective tissue– Muscle tissue – Nervous tissue

Found in the outer cover of body and in the inner cavities.

Has Two Types: Membranous epithelia:

form the coverings or linings of organs.

Glandular epithelia:form exocrine and endocrine glands.

Epithelial Tissue

• Has five functions: Secretion Absorption Excretion ProtectionSensation

Epithelial Tissue

Epithelial Tissue

Epithelium-Human Stomach

Glandular Epithelia

• Epithelial tissues illustrate a basic biological principle: that structure closely correlates with function

• Figure 4.4

• 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: – Fibrous Connective

tissue.– Specialized Connective

tissue

Section 4-1Connective Tissue

• An important structural component of organs – Consists of two types:

•Dense connective tissue •Loose connective tissue

Connective Tissue

• Perform specific functions essential to homeostasis

• The body contains three types of specialized connective tissue:

•Cartilage•Bone•Blood

Specialized Connective Tissues

•Cartilage – Consists of specialized cells embedded in a matrix of extracellular fibers and other extracellular material

•Blood –Contains blood cells, platelets, plasma

Osseous Tissue• Bone

– Consists of bone cells (osteocytes) and a calcified cartilage matrix•Two types of bone tissue exist: spongy and compact

• Consists of specialized cells that contract when stimulated

• The body has three types of muscle tissue:

•Skeletal (voluntary , striated)

•Cardiac (involuntary , striated)

Smooth (involuntary . non-striated)

Muscular Tissue

Muscular Tissue

Muscular Tissue

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.

Nervous Tissue

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.

Please refer toSylvia Mader

HUMAN BIOLOGY 12th

Edition

Dr Awad Widaa

THE END