There are four basic tissue types: epithelial, connective, muscle, and nervous tissue. Tissues combine to form organs, which are made of groups of tissues working together for a common function. Epithelial tissue forms sheets that cover surfaces or line cavities. Connective tissue connects and supports other tissues and includes bone, cartilage, fat, and blood. Muscle tissue includes three types: smooth, skeletal, and cardiac. Nervous tissue includes the brain, spinal cord, and nerves.

1. TissueTissue
An aggregation of cells and cell productsAn aggregation of cells and cell products
of similar structure and embryonic originof similar structure and embryonic origin
that perform a common functionthat perform a common function

2. Basic Tissue TypesBasic Tissue Types
 EpithelialEpithelial
 ConnectiveConnective
 MuscleMuscle
 NervousNervous

4. OrganOrgan
An aggregation of tissues organized intoAn aggregation of tissues organized into
a functional unita functional unit

5. Epithelial TissueEpithelial Tissue
 Sheet-like layer of cellsSheet-like layer of cells
 Cover surfaces or line cavitiesCover surfaces or line cavities
 Often has glandular cells for fluid secretionOften has glandular cells for fluid secretion
 EndotheliumEndothelium
 Epithelium that lines heart, blood vessels andEpithelium that lines heart, blood vessels and
lymphatic vesselslymphatic vessels

6. Epithelial TissueEpithelial Tissue

7. Connective TissueConnective Tissue
 Tissue that connectsTissue that connects
 Loose connective tissueLoose connective tissue
 adipose (fat)adipose (fat)
 Dense connective tissueDense connective tissue
 cartilagecartilage
 BoneBone
 Vascular tissueVascular tissue
 Erythrocytes: Red Blood Cells – carry oxygenErythrocytes: Red Blood Cells – carry oxygen
 Leucocytes: White Blood Cells – part of the immune systemLeucocytes: White Blood Cells – part of the immune system
 Platelets - clottingPlatelets - clotting

8. CNNECTIVE TISSUECNNECTIVE TISSUE

9. Erythrocytes:
Red Blood Cells

10. Muscle Tissue TypesMuscle Tissue Types
 Smooth Muscle (=Involuntary Muscle)Smooth Muscle (=Involuntary Muscle)
 Ex. Small intestineEx. Small intestine
 Skeletal Muscel (=Voluntary Muscle)Skeletal Muscel (=Voluntary Muscle)
 Ex. Large muscles of bodyEx. Large muscles of body
 Cardiac MuscleCardiac Muscle

11. Skeletal Smooth
Cardiac

12. Nervous TissueNervous Tissue
 Includes Nerves, Spinal Cord, BrainIncludes Nerves, Spinal Cord, Brain
 Cells are called neuronsCells are called neurons

13. NeuronNeuron