1. Epithelial Tissue – Human Squamous Epithelium


Squamous epithelium is made up of very thin, flat, scale like cells that are tightly packed together. The cells have irregular edges and a flattened nucleus at the center. Because the cells are so thin, they form a smooth surface that allows substances to pass through easily. Commonly found lining the alveoli of the lungs, the capillaries, and the inner lining of blood vessels where rapid diffusion and filtration occur.

2. Connective Tissue – Areolar Tissue


Areolar tissue has a loose and irregular arrangement of fibers. You should show collagen fibers (thicker strands), elastic fibers (thin strands), and scattered fibroblast cells. There are open spaces between the fibers, giving it a soft and airy appearance. Found beneath the skin, between muscles, around blood vessels and nerves, and surrounding organs where it acts as packing and support material.

3. Muscle Tissue – Smooth Muscle (Placenta)


Smooth muscle cells are spindle shaped with pointed ends and a single centrally located nucleus. The cells are arranged closely together in sheets. They do not have visible striations. In the placenta, smooth muscle is seen in the walls of blood vessels supplying the placenta. Located in the walls of blood vessels within the placenta, helping regulate blood flow between the mother and the fetus.

4. Nervous Tissue – Neuron


A neuron has a large cell body (soma) with a prominent nucleus. It has many short branched extensions called dendrites and one long extension called the axon. Supporting cells called neuroglia may be seen around the neuron. Found in the brain, spinal cord, and peripheral nerves where it functions in transmitting electrical impulses throughout the body.