The amount of pain one experiences is not directly connected to the amount of tissue damage. In fact, it is possible for pain to occur without any tissue damage at all! A video lesson digs into the science behind the phenomenon and asks...

Have you ever wondered what causes tumors to grow? VEGF is a very important factor because it is a hormone that causes blood vessels to grow and is triggered by cancer cells to increase blood supply to a tumor. Viewers learn about the...

Cell specialization is amazing! How do they know what they should become? A video from an interesting biology playlist examines the process of cell specialization. Content includes where we find specialized cells, types of specialized...

Epithelial tissues plays a variety of roles in the human body, including covering, lining, making a barrier, protection, excretion, filtration, absorption, and sensation. The video teaches high schoolers about epithelial tissue and its...

Once a nerve cell is damaged, it cannot be reproduced. Video number two in a series of 47 introduces high schoolers to tissues, focusing on the four types: nervous, muscle, epithelial, and connective. The narrator teaches their...

The leader of the biology gang is known as the nucleus. In the video, learners see the different levels of the hierarchy of life. Scholars explore each level, listening to descriptions and seeing examples of each one. It is the second...

Penguins, seals, and whales have countercurrent heat exchangers to limit blood flow in certain areas of their body, limiting their rate of heat loss to their environment. In this homeostasis video, the instructor explains that...

Let's get to the root of biology. A video describes the difference between monocot and dicot plants. Then it explains the three main types of tissues in plants and the cells within each of these tissues. 

What makes animals, well, animals? Viewers of a via comparative anatomy video see how similarities and differences in animal anatomy help support the theory of evolution. The video also includes examples of shared characteristics in...

Embryonic stems cells were only first discovered in 1998 — less than 20 years ago. The video explains what stem cells are (both pluripotent and totipotent), how they become specific types of tissues cells via internal cues such as the...

What do matryoshka dolls have to do with the organization of life? Young scientists learn about the levels of organization of life in the last installment of a five-part video series. The video covers the cellular, organismal, and...

It might look like he's doing nothing, but at the cellular level, he's quite busy. A video provides an overview of the many different biological levels. Using two different graphic organizers and many cartoon drawings...

Meet Lindsey, a mechanical engineer who has taken up bioengineering. She uses her skills to model blood vessels and their interaction with regenerating tissues. She continues to discuss the future of bioengineering in an informative video.

Most of us have suffered an injury we'd prefer to forget, but lingering scars just won't let us. Watch this video to find out exactly what happens during the healing process that cuases these changes to skin and organ tissue.

Did you know that the biggest organ in the human body isn't the brain, the liver, or even the lungs? It's the skin. Follow along with this short video as it explores the structure of human skin and its amazing ability to...

In this episode, Hank provides a brief history of histology and introduces the different types and functions of your body's tissues. [10:42]

On today's episode of Crash Course Anatomy & Physiology, Hank continues our exploration of tissues, with an introduction to your connective tissues. [10:39]

In this episode of Crash Course Anatomy & Physiology, Hank gives you a brief history of histology and introduces you to the different types and functions of your body's tissues. [10:43]

Hank introduces us to the "simplest" of the animals, complexity-wise: beginning with sponges (whose very inclusion in the list as "animals" has been called into question because they are so simple) and finishing with the most complex...

Website introduces the subject of histology through text, images, and video. [9:38]

Today on Crash Course Anatomy & Physiology, Hank breaks down the parts and functions of one of your body's unsung heroes: your epithelial tissue. [10:16]

Paul Andersen explains how cells differentiate to become tissue specific. He also explains the role of transcription factors in gene regulation. The location of a cell within the blastula ultimately determines its fate. The SrY gene is...

A video lesson exploring the levels of organization in a living organism from smallest to largest. Learn the smaller particles that make up an organism. [1:58]