Crash Course
Urinary System (Part 2)
The narrator of this video details the urinary system by looking at how bodies regulate the production of urine and how urine is stored and excreted from the body. The narrator finishes by discussing the nervous system's role in the...
Crash Course
Immune System (Part 1)
A lack of good sleep weakens your immune system by making you more susceptible to infections and making recovery time longer. Video 45 in a series of 47 focuses on the immune system. Pupils hear how the body defends itself, from its...
Crash Course
Immune System (Part 3)
Who loves their immune system ... antibody? Antibody? The last video in a series of 47 takes a look at the cellular immune system. Learners see how specific cells in the body attack other body cells that are infected with pathogens. To...
Crash Course
Reproductive System – Female Reproductive System (Part 1)
Pupils learn about menstruation and the female reproductive system in the 40th video of 47. Beginning with the anatomy and moving into hormones and ovulation, the narrator teaches an abundance of vocabulary and information regarding...
Crash Course
Endocrine System – Hormone Cascades (Part 2)
More than 27 million Americans have some type of thyroid disease. In the 24th video in a series of 47, scholars see how the hypothalamus-pituitary-thyroid axis works in the human body. The narrator then explores what happens to the body...
Crash Course
Immune System (Part 2)
Scientists are creating an experimental vaccine for the Ebola virus, which in clinical trials, is working. Such vaccines are the topic of a video about the adaptive immune system. The narrator discusses how a body reacts to pathogens in...
Crash Course
The Skeletal System
Humans have 54 bones in their hands, fingers, and wrists, allowing for a variety of movement. The 19th video in a series of 47 introduces learners to the anatomy of the skeletal system. The narrator teaches about flat, short, and...
Crash Course
Autonomic Nervous System
The sympathetic nervous system is what puts a person into fight or flight mode in scary situations. The 13th video in a series of 47 covers the autonomic nervous system, specifically how the sympathetic and parasympathetic systems work...
SciShow
Why Do We Itch?
What causes bug bites and other irritants to itch? Science scholars discover the body chemistry responsible for itching in the 130th video in a 143-part series. Topics include conditions that cause itching, the neurotransmitter that...
Crash Course
Peripheral Nervous System
The brain does not feel pain, which is why surgeons can perform brain surgery without anesthesia or while the patient is awake. Pupils see how the peripheral nervous system allows humans to feel pain. The narrator explores the afferent...
Crash Course
The Nervous System – Synapses! (Part 3)
The narrator of this short video breaks down synapses and how they work in video number 10 in a series of 47 about the human body. It specifically focuses on electrical and chemical synapses and how they work, and ends by exploring...
Crash Course
Sympathetic Nervous System
The sympathetic nervous system's job is to prepare the body in situations that threaten your survival. Video 14 in a series of 47 about the body specifically focuses on the sympathetic nervous system and stress. The narrator explains how...
American Chemical Society
The Chemistry of Poison Ivy
Leaves of three, let it be! Why does poison ivy produce such a terrible, itchy rash? Young outdoor enthusiasts get acquainted with urushiol, poison ivy's rash-producing natural oil, with a video from the American Chemical Society's...
Crash Course
Endocrine System – Glands and Hormones (Part 1)
Hug it out! Hugging releases oxytocin, a hormone proven to reduce swelling, thus hugging can heal physical wounds faster. Hormones control many things in the body, from healing it to causing emotions, so understanding more about them is...
Crash Course
Digestive System (Part 2)
It takes about seven seconds for food to move from the mouth to the stomach. Pupils follow food from the mouth through digestion, exploring where mechanical and chemical digestion occur. Saliva, enzymes, acids, and chyme are a small...
Crash Course
Respiratory System (Part 2)
Hemoglobin which is red, carries oxygen in RBC, and is responsible for the color of our blood. Video 32 in a series of 47 focuses on how your blood exchanges oxygen and carbon dioxide to maintain homeostasis. Scholars see how hemoglobin...
Be Smart
Why Do We Itch?
Our skin is the first line of defense against insects, parasites, and other irritants. How do we defend it? Step inside the science of scratching with a video from an informative playlist. Topics include how itching evolved, what happens...
Crash Course
The Nervous System – Action! Potential! (Part 2)
There are about 100,000 chemical reactions happening in your brain every second to help you sense and respond to the world around you. After a brief review of electricity, the narrator explores the action potential neurons used to sense...
Crash Course
Reproductive System – Sex and Fertilization (Part 3)
Having sex calms nerves, reduces blood pressure, and reduces stress. Video 42 in a series of 47 specifically focuses on sex and fertilization. The narrator discusses how scientists determined the four phases of sexual response during the...
Crash Course
Tissues (Part 1)
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 roles in...
Crash Course
Muscles – Organismal Level (Part 2)
Humans use 200 muscles to take one step — that's a lot of muscles! Learners see how skeletal muscles work to pull on bones, creating movement. The narrator then explores motor units, muscle twitches, impulses, contractions, and isotonic...
Crash Course
Blood – True Blood (Part 1)
Teach your class about human blood and explain why donation is so important using the 29th video in a series of 47. Learners explore the basic components of blood, how cuts stop bleeding, and how antigens determine blood types.
Crash Course
Tissues – Epithelial Tissue (Part 2)
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...
Crash Course
Tissues – Types of Connective Tissues (Part 4)
Did you know your blood and bones are examples of connective tissue? This is video number five in a series of 47 and further explores connective tissues. Pupils learn about other types of connective tissues, what these look like, where...