Structural Organisation in Animals Test - 2

The ciliated epithelium is mainly present in the inner surface of hollow organs like bronchioles and fallopian tubes.

The columnar epithelium is found in the lining of stomach and intestine and help in secretion and absorption. It also provides barrier against harmful micro organisms.

The squamous epithelium is made of a single thin layer of flattened cells with irregular boundaries. They are found in the walls of blood vessels and air sacs of lungs and are involved in functions like forming a diffusion boundary.

In all connective tissues except blood, the cells secrete fibres of structural proteins called collagen or elastin.

Dense irregular connective tissue provide strength to body parts. Hence the cells and fibres are packed compactly.

Tendons are dense connective tissue which provide strength and attach  muscles to bones.

Blood, bone, lymph forms the connective tissue that connects the different parts of the body
Nerve cells are parts of neural system or nervous system that transmit information from one part of the body to others.

The cuboidal epithelium is composed of a single layer of cube-like cells found in ducts of glands and tubular parts of nephrons in kidneys and its main functions are secretion and absorption.

The neuroglial cells which constitute the rest of the neural system protect and support neurons. Neuroglia makes up more than one-half the volume of neural tissue in our body.

In between cardiac muscle fibres, there are communication junctions which are made up of intercalated discs.