CH 3 TISSUE : PLANT AND ANIMAL TISSUES

Blood is composed of: The liquid part- plasma and The cellular part – red blood cells, white blood cells, and platelets.

Bone is a hard porous tissue. It has a good supply of blood vessels and nerves. it consists of both living and rigid mass of inorganic salts.

Cartilage is a non-porous tissue. it has a thickened intercellular substance. It has no blood vessels or nerves.

There are three characteristics of connective tissues: An abundance of intercellular substances – the matrix Fewer cellular elements, and Fibers

Connective tissues are those tissue that binds one tissue with another, and also connects various organs, keeping them in their proper place.

The stratified epithelium is found in the skin and the cornea. It is composed of several layers of other same or different kinds of epithelial cells.

The columnar epithelium contains vertically arranged cylindrical or brick-like cells.

Cuboidal epithelium is found in some parts of kidney tubules and in some glandular duct such as those of salivary glands, pancreatic duct.

Squamous epithelial is composed of cells, which are thin, and flat with prominent nuclei closely packed.

The epithelial tissue functions for protection, absorption, secretion, sensory perception, etc.