Visual Histology

Section Information

Histology is a part of biology and medicine that focuses on the microscopic study of animal tissues and cells. Visual Histology was developed by Dr. David Moran and Carter Rowley, designed for individual study or as an integrated multimedia educational system.

Videos in this Section

Microscope

Dr. David Moran presents an easy and accurate way to align a light microscope to produce the best images with the highest resolution. Using through-the-lens technology with a Zeiss laboratory microscope, he shows ways of obtaining striking images through phase contrast microscopy and Nomarski interference contrast microscopy.

The Cell

Dr. Moran leads the video through striking light and electron-microscopic images of the key membrane systems, organelles, and other subcellular components, relating biological images to diagrams along the way.

Epithelial Tissue

This video starts with a discussion about the structure, function, and classification of epithelia. Dr. Moran then goes through some clear, beautiful light and electron microscopic images of a variety of simple and stratified squamous, cuboidal, and columnar epithelia. 

Connective Tissue

In this video, Dr. Moran shows us how connective tissues hold our bodies together with diagrams, light micrographs, and electron micrographs of tissues that contain collagen fibers, reticular fibers, and elastic fibers and the very cells that make them.

Blood

This video teaches students to identify all of the major types of red and white blood cells commonly encountered in a stained smear of normal blood. 

Cartilage

Dr. Moran shows how the properties of the three classes of cartilage: hyaline cartilage, elastic cartilage, and fibrocartilage are derived from the ground substance and the chondrocytes that secrete them. In addition to light and electron microscopic images, a short video clip of knee cartilage surgery viewed through an operating arthroscope is shown.

Bone

Dr. Moran shows us that the bones that support us and lend direction to our human morphology are very much alive and are in a constant state of formation, de-construction, and reconstruction by osteoclasts, osteoblasts, osteocytes, and other specialized cells.

Muscle

In this video, Dr. Moran illustrates the histology (or cytology) of skeletal muscle, cardiac muscle, and smooth muscle with diagrams, beautiful light micrographs photographed with Zeiss planapochromatic optics, and high resolution electron micrographs.

Nerve

Dr. Moran shows how different nerve cells, or neurons, work together to form the wiring diagram that allows different parts of the human body to connect with and therefore interact with one another and the outside world. The half-hour video program begins with an introduction to the cytoarchitecture of neurons and their arrangement in the nervous system. The video also shows light microscopic and electron microscopic images (along with helpful diagrams) that illustrate the ways in which neurons are constructed and organized.

Skin

Dr. Moran starts this video of the microscopic anatomy of skin with a brief introduction to the histology of the largest organ in the body. Then, he shows light and electron microscopic images of the epidermis and the dermis of thick and thin skin, emphasizing the relationship between structure and function of the cells and extracellular materials that lend skin its remarkable qualities. 

Circulatory

Dr. Moran teaches about the microscopic anatomy of arteries, veins, and capillaries of the body. After a brief introduction, the video takes us on a tour of light and electron microscopic images that show the arrangement of cells and extracellular materials that endow these blood vessels with their functions.

Respiratory System

Dr. Moran takes us on a guided tour of the respiratory tree, showing and explaining images of the trachea, bronchi, bronchioles, terminal bronchioles, and alveoli. Using matched pairs of light and electron micrographs, he shows us how gas exchange occurs across the thin, fragile walls of alveoli.

Oral Cavity

In this video, Dr. Moran demonstrates the histology of the major components of the oral cavity. The microscopic anatomy of the teeth, gingiva, tongue, and salivary glands is related to their function in receiving, masticating, and enzymatically reacting with food that enters the oral cavity the first stage of the digestive system and digestive process. The histology of ameloblasts, which form enamel, and the odontoblasts which secrete dentin are shown.

Esophagus & Stomach

Dr. Dave Moran gives a clear, simple, elegant description of the cells and tissues that create the esophagus and stomach. Using high-resolution light and electron microscopic images, he leads us through the upper, middle, and lower esophagus as well as the cardiac, gastric, and fundic regions of the stomach.

Small & Large Intestine

In this video, Dr. Dave Moran shows us the histology of the small and large intestine. The microscopic anatomy of the duodenum, ileum, and jejunum are illustrated by light and electron microscopy, and the relationship of their structures to their functions is clearly described. The microscopic anatomy of the colon and rectum are illustrated and discussed in detail.

Liver & Gall Bladder

In this video, the histologic organization of the liver including the spatial arrangement of the components of the liver lobule is clearly demonstrated by light microscopy supplemented with diagrams. Dr. Moran illustrates the microanatomy of the hepatocytes, Kuppfer cells, and sinusoids, and describes their physiologic functions, emphasizing the role the liver plays in both cleansing and providing nutrients to the blood.

Pancreas

In this video, the microanatomy and physiology of the exocrine and endocrine pancreas are described in detail. Dr. Moran and his co-author Carter Rowley have assembled a series of light and electron micrographs that make the histology of the pancreas very easy for students to learn.

Urinary System

Dr. Moran’s explanations of the structure and function of the kidneys and urinary bladder make it easy to learn, comprehend, and assimilate. A combination of diagrams, light micrographs, and electron micrographs clarify the organization of the functional unit of the kidney the nephron.

Lymph Nodes, Spleen, & Thymus

In this video, Dr. Moran uses diagrams, high-resolution light microscopy, and electron microscopy, to illustrate and explain the histology of the lymph nodes, lymphatic system, the spleen, and the thymus in a clear and simple way.

Male Reproductive System

Dr. Dave Moran gives a brief, clear introduction (assisted by a model) to the anatomy of the male reproductive system. Then, microscopic images of the penis, testicles, seminiferous tubules (including the spermatogenic series), epididymis, vas deferens, prostate gland, and seminal vesicles are shown and explained in detail.

Female Reproductive System I: Ovary & Fallopian Tube

Dr. Moran presents a clear introduction of the histology of the female reproduction system. Then he shows us clear light and electron micrographs of the ovary and Fallopian tube. He makes the process of oogenesis clear and understandable with images of the egg in all stages of development including the progesterone-secreting corpus luteum. The online histology video emphasizes the relationship between the structure and function of ovarian morphology and components and hormonal activity of the menstrual cycle.

Female Reproductive System II: Uterus, Cervix, Vagina & Mammary Gland

The complexity of the female reproductive system requires two DVD programs. In this second video on the female reproductive system, Dr. Moran after introducing the anatomy of the system with a model clearly explains the histology of the uterus, cervix, vagina, and mammary glands.

Endocrine System

In this video, Dr. Dave Moran shows us the microscopic anatomy of the major glands of the endocrine system and relates them to the hormones they secrete and the physiological functions they stimulate in their target organs. The histology of the hypothalamus, pituitary gland (adenohypophysis and neurohypophysis), thyroid gland, adrenal glands, and endocrine cells of the ovary and testes are clearly illustrated by light and electron microscopy.

Ear, Nose, & Tongue

In this video, Dr. Moran shows the histology of the sensory structures within the ear, nose, and tongue. Then, along with co-author Carter Rowley, he shows us very clear light and electron micrographs of the Organ of Corti, the human olfactory epithelium, and the taste buds of the human tongue. 

The Eye

Dr. Dave Moran takes us on a journey through the anatomic structure, histology, and ultrastructure of the human eye, emphasizing the physiology performed by specific structural elements that permit the visual process to occur. An ingenious diagram juxtaposed with a low-magnification micrograph of the retina shows how the classic histological layers of the retina are created by its neuronal elements. The histology of the sclera, cornea, iris, lens, and retina are illustrated by light and electron microscopy. 

Final Examination

In this video, Dr. Dave Moran shows light micrographs of specific histologic specimens and asks pointed questions about the scientific name, structure, and function of specific elements contained within the micrograph shown on the screen. Having asked the question and giving students the time to formulate their answer Dr. Dave gives a detailed answer. This video is a great tool for self-teaching as well as for self-evaluation.