Human Physiology Quiz: The Heart & Blood

Study Notes

Atoms are the fundamental building blocks of matter.
Cells are the smallest units of living organisms.
Tissues consist of similar cells working together for a common function.
Organs are formed from two or more tissue types working together.
Organ systems are groups of organs that collaborate to achieve a specific purpose.
Organisms represent the highest level of structural organization.

Lymphatic System
- Transports fluid leaked from blood vessels back to the bloodstream.
- Lymph nodes and organs cleanse the blood and house white blood cells for immunity.
Respiratory System
- Supplies oxygen to the body and removes carbon dioxide.
Digestive System
- Breaks down food and provides nutrients to the bloodstream.
- Eliminates indigestible substances as feces.
- The liver aids in digestion by producing bile; the pancreas contributes enzymes.
Urinary System
- Eliminates nitrogenous wastes and regulates water, electrolyte, and acid-base balance.
Reproductive System
- Responsible for producing offspring.
- Testes generate sperm and male hormones; ovaries produce eggs and female hormones.
Skeletal System
- Composed of bones, cartilage, and joints; provides structural support and mineral storage.
Muscular System
- Facilitates body movement through muscle contraction.
Nervous System
- Fast-acting control system that responds to stimuli via the brain, spinal cord, and nerves.
Endocrine System
- Composed of glands that secrete hormones to regulate growth, reproduction, and metabolism.
Cardiovascular System
- Transports blood and is essential for oxygen and nutrient delivery throughout the body.