HESI A2 Body Systems

Vocabulary flashcards covering the definitions, main organs, and functions of the eleven human body systems for HESI A2 preparation.

Integumentary System

The body's outer covering. Main organs: Skin, hair, nails, glands. Function: Protects the body and regulates temperature.

Skeletal System

The body's supporting framework. Main organs: Bones, joints, cartilage. Function: Supports and protects organs; makes blood cells.

Muscular System

Muscles that move the body. Main organs: Skeletal muscles and tendons. Function: Produces movement, posture, and heat.

Nervous System

The body's rapid control and communication system. Main organs: Brain, spinal cord, nerves. Function: Detects stimuli and coordinates responses.

Endocrine System

Glands that release hormones. Main organs: Pituitary, thyroid, adrenals, pancreas. Function: Regulates growth, metabolism, and reproduction.

Cardiovascular System

The body's blood circulation system. Main organs: Heart, blood vessels, blood. Function: Transports oxygen, nutrients, hormones, and wastes.

Respiratory System

The body's breathing and gas-exchange system. Main organs: Lungs, trachea, bronchi. Function: Takes in oxygen and removes carbon dioxide.

Digestive System

The system that processes food. Main organs: Stomach, intestines, liver, pancreas. Function: Digests food, absorbs nutrients, eliminates waste.

Urinary System

The body's urine-producing and waste-removal system. Main organs: Kidneys, ureters, bladder, urethra. Function: Removes wastes; balances water and electrolytes.

Lymphatic/Immune System

The body's fluid-return and defense system. Main organs: Lymph nodes, spleen, thymus. Function: Fights infections and returns tissue fluid to blood.

Reproductive System

The system responsible for reproduction. Main organs: Ovaries, uterus, testes. Function: Produces sex cells and hormones; supports reproduction.