1. Epithelial Tissue – Simple Cuboidal Epithelium

Simple cuboidal epithelium is composed of cube-shaped cells that are closely packed together in a single layer. Each cell has a round, centrally located nucleus. The cells form a smooth and uniform lining around small ducts and tubules. Because of their shape and arrangement, they are specialized for secretion and absorption. Commonly found in the kidney tubules, glandular ducts, and the surface of the ovaries where they help in filtration and secretion.

2. Muscle Tissue – Cardiac Muscle

Cardiac muscle is made up of branched, cylindrical cells that are connected end to end. The cells have a single, centrally located nucleus and show visible striations. Dark lines called intercalated discs are present between adjacent cells, allowing rapid electrical communication. These features help the heart contract in a coordinated manner. Found exclusively in the walls of the heart where it pumps blood throughout the body.

3. Connective Tissue – Decalcified Bone

Decalcified bone tissue shows a network of collagen fibers and bone cells after the mineral content has been removed. You can observe circular structures called Haversian systems with a central canal, surrounded by concentric rings called lamellae. Small spaces called lacunae contain osteocytes. Fine canals called canaliculi connect the lacunae. Found in the skeletal system, providing structural support and protection for vital organs.

4. Nervous Tissue – Multipolar Neuron

A multipolar neuron has a large, irregularly shaped cell body with a prominent nucleus and nucleolus. It has many branched dendrites extending from the soma and one long axon. These multiple processes allow the neuron to receive and transmit signals efficiently. Supporting cells called neuroglia are often seen around the neuron. Found in the brain and spinal cord, where it plays a major role in processing and transmitting nerve impulses.