Tissues are made up of a group of similar cells together and perform a similar function. They are complex structures, which helps organisms to carry out their functions.
Tissues are two types:
  1. Simple tissues - They are made up of similar types of cells, and they are always homogenous in nature.
  2. Complex tissues - They are made up of different types of cells, and they are always heterogeneous in nature.
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Types of tissues
1. Epithelial tissue - Very important tissue carries the following functions like protection, secretion, excretion, absorption.
Epithelial tissues
2. Connective tissue - The main support system and also does the following functions like strength, storage, transport, packing, repair, defence.
Connective tissues
3. Muscular tissue - It helps for the movements, heat production, joint stabilizing.
  • The locomotion and movements of the body are supported by the skeletal muscle.
  • Smooth muscles are found in the body, and they make up all of the internal organs.
  • Cardiac muscle is a type of muscle that is located in and around the heart.
From top to bottom: a. skeletal muscle, b. smooth muscle, c. cardiac muscle
4. Nervous tissue - It carries the neural impulses in two ways - Sensory and Motor Neuron.
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Neuron tissue