Tissues
Nervous Tissue
Epithelial Tissue
Connective Tissue
Muscle Tissue
Parts of Epithelial Issue
The basal surface
Lateral surfaces
The apical surface
Can be divided in two:
Glandular epithelium
Covering and lining epithelium
Skin and some internal organs
Secreting portion of glands such as the thyroid gland, adrenal glands, and sweat glands
Classified by two characteristics:
Shape of the cells
Number of layers of the cell
Squarmous
Stratified
Cuboidal
Columnar
Pseudostratified
Simple
Glandular epithelium
A gland may consist of a single cell or a group of cells that secret substances into ducts, onto a surface, or into the blood.
Types of epithelium
Endocrine Gland
Exocrine gland
Mixed Gland
Funtions:
protects and insulates internal organs
serves as the major transport system
main source of immune responses
Compartalize structures
binds together, supports, and strengthens other body tissues
primary location of stored energy reserves
Parts of the Connective Tissue
Reticular fibers
Elastic fibers
Collagen fibers
Types of Connective Tissue
Adipose tissue
Blood
Loose fibrous connective tissue
Fibrous connective tissue
Cartilage
Bone
Reticular connective tissue
Lymph
Funtions
maintains posture
moves substances within the body
stores substances within the body
provides protection
produces body movements
generates heat
Properties
Contractility
Extensibility
Electrical excitability
Elasticity
Types of Muscular Tissue
Cardiac Muscle
Skeletal Muscle
Smooth Muscle
Neuroglia
Oligodendrocytes - form myelin sheaths
Astrocytes - provide nutrients to neurons
Epedymal cells - line the fluid-filled spaces of the brain and spinal cord
Microglia - support neurons and engulf bacteria and cellular debris
Neuron
Axon - Conducts nerve impulses away from the cell body.
Myelin - white fatty substance that increases the speed of nerve impulses
Dendrite - it conducts signals towards the cell body.
