What is the function of the thymus? A. traps pathogens in lymph B. filters the blood C. mediates...

The adrenal glands secrete hormones that help maintain balance in your body. But, if these hormones are over- or under-secreted, disease can develop. In this lesson, you will learn about disorders of the adrenal glands, including Addison's disease and Cushing's syndrome, as well as their treatments.

In this lesson, we'll discuss the functions of the anterior and posterior portions of the pituitary gland, the hormones they release and the relationship with the hypothalamus.

Your lymphatic system is an important part of your body's defense team. Learn about structures of the lymphatic system, such as the lymphatic vessels, spleen, thymus gland, tonsils and Peyer's patches, and the roles they play in keeping you healthy.

Without proper communication between the brain, ovaries and uterus, reproduction might not be as efficient. Learn about how these organs work together to ensure the body is ready for reproduction.

This lesson will help you understand the anatomy and function of lymph nodes, and you will learn where lymph nodes are located in your body. A quiz at the end of the lesson will test your knowledge.

This lesson explores a very common and well-known form of inflammatory arthritis called rheumatoid arthritis. We'll discuss why it occurs, how it can be diagnosed, how it differs from osteoarthritis, and how it can be treated.

This lesson will focus in on the generalities of B-cells, such as their place of generation, maturation, and training, as well as some specific types of B-cells, such as plasma cells and memory cells.

Cartilage is an important tissue in your body that covers the ends of long bones, acts as a shock absorber in your spine, and protects and supports many body structures. In this lesson, you will learn about the three types of cartilage.

In this lesson, you will learn about the lymphatic system and the vital role it plays in keeping the cardiovascular system working. You'll discover how the lymphatic system (with its lymphatic vessels and capillaries) quietly works in the background to return leaked fluids back to the blood.

It's summertime, and you're applying sunscreen to avoid sunburn. But did you wonder what sunscreen does and what it protects us from? In this lesson, we'll learn all about UV radiation and some of its effects.

A balanced body chemistry is crucial for a healthy human body. A sudden drop in pH can cause significant damage to organ systems and even death. This lesson takes a closer look at a condition in which the pH of the body is severely compromised called diabetic ketoacidosis.

Did you know that some people don't feel pain? Or that some always feel as if their skin is on fire? Learn about the causes of these diseases and the anatomy of the skin they affect in this lesson- the dermal layer of the skin.

The large intestine is the made up of the cecum, colon, rectum and anal canal. In this lesson, you will learn about the anatomical features and basic functions of these large intestine segments.

The islets of Langerhans within your pancreas produce the hormones insulin and glucagon. In this lesson, you will learn how these hormones regulate your blood sugar level in opposite ways.

The chromosomes inside of a person's cells can undergo structural changes or changes in number, causing severe and fatal disorders. In this lesson, we'll outline what these changes are and discuss examples of some of these disorders.

In this lesson, you will learn what lymphatic vessels are and why they are important for fluid management, immune function, and fat absorption. You'll then take a short quiz to test your knowledge.