Anatomy and Physiology Resources

A biological pathway is a series of actions among molecules in a cell that leads to a certain product or a change in the cell. It can trigger the assembly of new molecules, such as a fat or protein, turn genes on and off, or spur a cell to move.

Chromosomes are thread-like structures located inside the nucleus of animal and plant cells.

Blood vessels are the channels or conduits through which blood is distributed to body tissues.

The endocrine system is made up of glands that make hormones. Hormones are the body's chemical messengers. They carry information and instructions from one set of cells to another.

Information on the bones, joints, muscles, nerves, etc. that make up the hand.

Your heart is at the center of your circulatory system. This system is a network of blood vessels, such as arteries, veins, and capillaries, that carries blood to and from all areas of your body. Your blood carries the oxygen and nutrients that your organs need to work properly.

The lungs are the centerpiece of your respiratory system. Your respiratory system also includes the trachea (windpipe), muscles of the chest wall and diaphragm, blood vessels, and other tissues. All of these parts make breathing and gas exchange possible.

Information on the Lymphatic System and its three primary functions.

Information on the layers of the skin and their functions.

Information on the mouth and teeth and their functions.

Information on the immune system and how it works.

Skin, hair, and nails are made of similar types of cells. They form the outer layer of the body, called the integumentary system. It protects everything inside the body.

The urinary tract is the body’s drainage system for removing urine, which is made up of wastes and extra fluid. The urinary tract includes two kidneys, two ureters, a bladder, and a urethra.

The pancreas is a long flattened gland that has two functions: it is a vital part of the digestive system and a critical controller of blood sugar levels.

Information on the digestive system and how it functions.

Information on Kidneys and how they function.

Links to images of body systems and organs.

National Library of Medicine anatomy videos.

Information on the male reproductive system.

Information on the female reproductive system.