Histology
What is histology ?
Histology is the microscopic structure of tissue.
Tissue types
There are four defined tissue types. Those include epithelial tissue, connective tissue, muscular tissue, and nervous tissue.
Epithelial tissue
An important function of the epithelial tissue is that it covers body surfaces and lined body cavities and to secrete.
Characteristics of epithelial tissue are the amount of layers which include: stratified and simple and, the shapes which include: columnar, squamous, and cuboidal.
Connective Tissue
There are five different types of connective tissue which are bone, cartilage, dense connective tisse, loose connective tissue, and blood. Important functions of connective tissue include protecting organs, connection of body tissues, and support. Some common characteristics is it has a variable blood supply. Good blood supply in bones and fat, poor blood supply to tendons and ligaments, and no blood supply to cartilage. Another characteristic is that it has an extracellular matrix meaning there is a nonliving substance outside of the cell. This extracellular matrix can be liquid, gel, or solid.
Muscular Tissue
The important function of muscular tissue is to contract. There are three different types of muscle tissue. Skeletal muscle which is muscle tissue packed into organs by connective tissue to form muscles. Cardiac muscle which is found only in the heart. Smooth muscle has no visible striations and cells have one nucleus.
Nervous Tissue
The important function of the nervous tissue is irritability and conductivity. The apperance would look lik a rod with a bulb on the end.
Smooth muscle
Skeletal muscle
Cartilage
